observer: Improve handling of Unicode

35 files changed, 454 insertions, 350 deletions

diff --git a/lib/observer/src/cdv_atom_cb.erl b/lib/observer/src/cdv_atom_cb.erl
index a123354c8f..86cdf2fd6d 100644
--- a/lib/observer/src/cdv_atom_cb.erl
+++ b/lib/observer/src/cdv_atom_cb.erl
@@ -42,7 +42,7 @@ get_info(_) ->
     {Info,TW}.
 
 format({Bin,q}) when is_binary(Bin) ->
-    [$'|binary_to_list(Bin)];
+    [$'|lists:flatten(io_lib:format("~ts",[Bin]))];
 format({Bin,nq}) when is_binary(Bin) ->
     lists:flatten(io_lib:format("~ts",[Bin]));
 format(D) ->
diff --git a/lib/observer/src/cdv_bin_cb.erl b/lib/observer/src/cdv_bin_cb.erl
index 5472d36a6f..5502869973 100644
--- a/lib/observer/src/cdv_bin_cb.erl
+++ b/lib/observer/src/cdv_bin_cb.erl
@@ -38,6 +38,7 @@ init_bin_page(Parent,{Type,Bin}) ->
       [{"Format \~p",cdv_html_wx,{Type,format_bin_fun("~p",Bin)}},
        {"Format \~tp",cdv_html_wx,{Type,format_bin_fun("~tp",Bin)}},
        {"Format \~w",cdv_html_wx,{Type,format_bin_fun("~w",Bin)}},
+       {"Format \~tw",cdv_html_wx,{Type,format_bin_fun("~tw",Bin)}},
        {"Format \~s",cdv_html_wx,{Type,format_bin_fun("~s",Bin)}},
        {"Format \~ts",cdv_html_wx,{Type,format_bin_fun("~ts",Bin)}},
        {"Hex",cdv_html_wx,{Type,hex_binary_fun(Bin)}},
@@ -56,7 +57,7 @@ format_bin_fun(Format,Bin) ->
 binary_to_term_fun(Bin) ->
     fun() ->
 	    try binary_to_term(Bin) of
-		Term -> plain_html(io_lib:format("~p",[Term]))
+		Term -> plain_html(io_lib:format("~tp",[Term]))
 	    catch error:badarg ->
 		    Warning = "This binary can not be converted to an Erlang term",
 		    observer_html_lib:warning(Warning)
diff --git a/lib/observer/src/cdv_detail_wx.erl b/lib/observer/src/cdv_detail_wx.erl
index 27057fd27f..4c26e447a6 100644
--- a/lib/observer/src/cdv_detail_wx.erl
+++ b/lib/observer/src/cdv_detail_wx.erl
@@ -133,7 +133,7 @@ handle_event(Event, _State) ->
     error({unhandled_event, Event}).
 
 handle_info(_Info, State) ->
-    %% io:format("~p: ~p, Handle info: ~p~n", [?MODULE, ?LINE, _Info]),
+    %% io:format("~p: ~p, Handle info: ~tp~n", [?MODULE, ?LINE, _Info]),
     {noreply, State}.
 
 handle_call(Call, From, _State) ->
diff --git a/lib/observer/src/cdv_html_wx.erl b/lib/observer/src/cdv_html_wx.erl
index 0ab0ba4315..5158e95a65 100644
--- a/lib/observer/src/cdv_html_wx.erl
+++ b/lib/observer/src/cdv_html_wx.erl
@@ -62,7 +62,7 @@ handle_info(active, State) ->
     {noreply, State};
 
 handle_info(Info, State) ->
-    io:format("~p:~p: Unhandled info: ~p~n", [?MODULE, ?LINE, Info]),
+    io:format("~p:~p: Unhandled info: ~tp~n", [?MODULE, ?LINE, Info]),
     {noreply, State}.
 
 terminate(_Reason, _State) ->
@@ -72,7 +72,7 @@ code_change(_, _, State) ->
     {ok, State}.
 
 handle_call(Msg, _From, State) ->
-    io:format("~p~p: Unhandled Call ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p~p: Unhandled Call ~tp~n",[?MODULE, ?LINE, Msg]),
     {reply, ok, State}.
 
 handle_cast({detail_win_closed, Id},#state{expand_wins=Opened0}=State) ->
@@ -80,7 +80,7 @@ handle_cast({detail_win_closed, Id},#state{expand_wins=Opened0}=State) ->
     {noreply, State#state{expand_wins=Opened}};
 
 handle_cast(Msg, State) ->
-    io:format("~p~p: Unhandled cast ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p~p: Unhandled cast ~tp~n",[?MODULE, ?LINE, Msg]),
     {noreply, State}.
 
 handle_event(#wx{event=#wxHtmlLink{type=command_html_link_clicked,
@@ -118,7 +118,7 @@ handle_event(#wx{event=#wxHtmlLink{type=command_html_link_clicked,
     {noreply, NewState};
 
 handle_event(Event, State) ->
-    io:format("~p:~p: Unhandled event ~p\n", [?MODULE,?LINE,Event]),
+    io:format("~p:~p: Unhandled event ~tp\n", [?MODULE,?LINE,Event]),
     {noreply, State}.
 
 %%%-----------------------------------------------------------------
diff --git a/lib/observer/src/cdv_info_wx.erl b/lib/observer/src/cdv_info_wx.erl
index 01fe6b15f2..7e416dd11a 100644
--- a/lib/observer/src/cdv_info_wx.erl
+++ b/lib/observer/src/cdv_info_wx.erl
@@ -65,7 +65,7 @@ handle_info(active, State) ->
     {noreply, State};
 
 handle_info(Info, State) ->
-    io:format("~p:~p: Unhandled info: ~p~n", [?MODULE, ?LINE, Info]),
+    io:format("~p:~p: Unhandled info: ~tp~n", [?MODULE, ?LINE, Info]),
     {noreply, State}.
 
 terminate(_Reason, _State) ->
@@ -88,11 +88,11 @@ handle_call(new_dump, _From, #state{callback=Callback,panel=Panel,
     {reply, ok, State#state{fpanel=NewFPanel,trunc_warn=TW}};
 
 handle_call(Msg, _From, State) ->
-    io:format("~p~p: Unhandled Call ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p~p: Unhandled Call ~tp~n",[?MODULE, ?LINE, Msg]),
     {reply, ok, State}.
 
 handle_cast(Msg, State) ->
-    io:format("~p~p: Unhandled cast ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p~p: Unhandled cast ~tp~n",[?MODULE, ?LINE, Msg]),
     {noreply, State}.
 
 handle_event(#wx{event=#wxMouse{type=left_down},userData=Target}, State) ->
@@ -108,7 +108,7 @@ handle_event(#wx{obj=Obj,event=#wxMouse{type=leave_window}},State) ->
     {noreply, State};
 
 handle_event(Event, State) ->
-    io:format("~p:~p: Unhandled event ~p\n", [?MODULE,?LINE,Event]),
+    io:format("~p:~p: Unhandled event ~tp\n", [?MODULE,?LINE,Event]),
     {noreply, State}.
 
 %%%-----------------------------------------------------------------
diff --git a/lib/observer/src/cdv_multi_wx.erl b/lib/observer/src/cdv_multi_wx.erl
index b511503752..93f045b1da 100644
--- a/lib/observer/src/cdv_multi_wx.erl
+++ b/lib/observer/src/cdv_multi_wx.erl
@@ -94,7 +94,7 @@ handle_info(active, State) ->
     {noreply, NewState};
 
 handle_info(Info, State) ->
-    io:format("~p:~p: Unhandled info: ~p~n", [?MODULE, ?LINE, Info]),
+    io:format("~p:~p: Unhandled info: ~tp~n", [?MODULE, ?LINE, Info]),
     {noreply, State}.
 
 terminate(_Reason, _State) ->
@@ -112,11 +112,11 @@ handle_call(new_dump, _From, State) ->
     {reply, ok, NewState};
 
 handle_call(Msg, _From, State) ->
-    io:format("~p:~p: Unhandled Call ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p:~p: Unhandled Call ~tp~n",[?MODULE, ?LINE, Msg]),
     {reply, ok, State}.
 
 handle_cast(Msg, State) ->
-    io:format("~p:~p: Unhandled cast ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p:~p: Unhandled cast ~tp~n",[?MODULE, ?LINE, Msg]),
     {noreply, State}.
 
 handle_event(#wx{event=#wxCommand{type=command_listbox_selected,
@@ -136,7 +136,7 @@ handle_event(#wx{event=#wxCommand{type=command_listbox_selected,
     {noreply,NewState};
 
 handle_event(Event, State) ->
-    io:format("~p:~p: Unhandled event ~p\n", [?MODULE,?LINE,Event]),
+    io:format("~p:~p: Unhandled event ~tp\n", [?MODULE,?LINE,Event]),
     {noreply, State}.
 
 %%%%%%%%%%%%%%%%%%%%%%% Internal %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
diff --git a/lib/observer/src/cdv_proc_cb.erl b/lib/observer/src/cdv_proc_cb.erl
index 592150146b..f10650bbb7 100644
--- a/lib/observer/src/cdv_proc_cb.erl
+++ b/lib/observer/src/cdv_proc_cb.erl
@@ -71,7 +71,7 @@ get_details(Id, _) ->
 	    Proplist0 =
 		crashdump_viewer:to_proplist(record_info(fields,proc),Info),
 	    Proplist = [{expand_table,Tab}|Proplist0],
-	    Title = io_lib:format("~s (~s)",[Info#proc.name, Id]),
+	    Title = io_lib:format("~ts (~s)",[Info#proc.name, Id]),
 	    {ok,{Title,Proplist,TW}};
 	{error,{other_node,NodeId}} ->
 	    Info = "The process you are searching for was residing on "
diff --git a/lib/observer/src/cdv_table_wx.erl b/lib/observer/src/cdv_table_wx.erl
index df16230b70..ba23758ea6 100644
--- a/lib/observer/src/cdv_table_wx.erl
+++ b/lib/observer/src/cdv_table_wx.erl
@@ -74,7 +74,7 @@ handle_info(active, State) ->
     {noreply, State};
 
 handle_info(Info, State) ->
-    io:format("~p:~p: Unhandled info: ~p~n", [?MODULE, ?LINE, Info]),
+    io:format("~p:~p: Unhandled info: ~tp~n", [?MODULE, ?LINE, Info]),
     {noreply, State}.
 
 terminate(_Reason, _State) ->
@@ -84,15 +84,15 @@ code_change(_, _, State) ->
     {ok, State}.
 
 handle_call(Msg, _From, State) ->
-    io:format("~p~p: Unhandled Call ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p~p: Unhandled Call ~tp~n",[?MODULE, ?LINE, Msg]),
     {reply, ok, State}.
 
 handle_cast(Msg, State) ->
-    io:format("~p~p: Unhandled cast ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p~p: Unhandled cast ~tp~n",[?MODULE, ?LINE, Msg]),
     {noreply, State}.
 
 handle_event(Event, State) ->
-    io:format("~p:~p: Unhandled event ~p\n", [?MODULE,?LINE,Event]),
+    io:format("~p:~p: Unhandled event ~tp\n", [?MODULE,?LINE,Event]),
     {noreply, State}.
 
 %%%%%%%%%%%%%%%%%%%%%%% Internal %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
diff --git a/lib/observer/src/cdv_term_cb.erl b/lib/observer/src/cdv_term_cb.erl
index f0d90dde7c..f206d7e4c9 100644
--- a/lib/observer/src/cdv_term_cb.erl
+++ b/lib/observer/src/cdv_term_cb.erl
@@ -57,13 +57,7 @@ expand(['#CDVBin',Offset,Size,Pos], true) ->
     {ok,Bin} = crashdump_viewer:expand_binary({Offset,Size,Pos}),
     Bin;
 expand(Bin, Tab) when is_binary(Bin), not is_boolean(Tab) ->
-    Size = byte_size(Bin),
-    PrevSize = min(Size, 10) * 8,
-    <<Preview:PrevSize, _/binary>> = Bin,
-    Hash = erlang:phash2(Bin),
-    Key = {Preview, Size, Hash},
-    ets:insert(Tab, {Key,Bin}),
-    ['#OBSBin',Preview,Size,Hash];
+    observer_lib:make_obsbin(Bin, Tab);
 expand([H|T], Expand) ->
     case expand(T, Expand) of
 	ET when is_list(ET) ->
diff --git a/lib/observer/src/cdv_virtual_list_wx.erl b/lib/observer/src/cdv_virtual_list_wx.erl
index ebf58865e9..f3daae8e4d 100644
--- a/lib/observer/src/cdv_virtual_list_wx.erl
+++ b/lib/observer/src/cdv_virtual_list_wx.erl
@@ -73,7 +73,7 @@ start_detail_win(Id) ->
 	"#Port"++_ ->
 	    start_detail_win(Id, port);
 	_ ->
-	    io:format("cdv: unknown identifier: ~p~n",[Id]),
+	    io:format("cdv: unknown identifier: ~tp~n",[Id]),
 	    ignore
     end.
 
@@ -195,7 +195,7 @@ call(Holder, What) when is_pid(Holder) ->
 	    erlang:demonitor(Ref),
 	    Res
     after 5000 ->
-	    io:format("Hanging call ~p~n",[What]),
+	    io:format("Hanging call ~tp~n",[What]),
 	    ""
     end;
 call(_,_) ->
@@ -214,7 +214,7 @@ handle_info(active, State) ->
     {noreply, State};
 
 handle_info(Info, State) ->
-    io:format("~p:~p, Unexpected info: ~p~n", [?MODULE, ?LINE, Info]),
+    io:format("~p:~p, Unexpected info: ~tp~n", [?MODULE, ?LINE, Info]),
     {noreply, State}.
 
 terminate(_Reason, #state{holder=Holder}) ->
@@ -236,7 +236,7 @@ handle_call(new_dump, _From,
     {reply, ok, State#state{detail_wins=[],holder=NewHolder,trunc_warn=TW}};
 
 handle_call(Msg, _From, State) ->
-    io:format("~p:~p: Unhandled call ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p:~p: Unhandled call ~tp~n",[?MODULE, ?LINE, Msg]),
     {reply, ok, State}.
 
 handle_cast({start_detail_win,Id}, State) ->
@@ -248,7 +248,7 @@ handle_cast({detail_win_closed, Id},#state{detail_wins=Opened}=State) ->
     {noreply, State#state{detail_wins=Opened2}};
 
 handle_cast(Msg, State) ->
-    io:format("~p:~p: Unhandled cast ~p~n", [?MODULE, ?LINE, Msg]),
+    io:format("~p:~p: Unhandled cast ~tp~n", [?MODULE, ?LINE, Msg]),
     {noreply, State}.
 
 %%%%%%%%%%%%%%%%%%%%LOOP%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -322,7 +322,7 @@ handle_event(#wx{event=#wxList{type=command_list_item_activated,
     {noreply, State};
 
 handle_event(Event, State) ->
-    io:format("~p:~p: handle event ~p\n", [?MODULE, ?LINE, Event]),
+    io:format("~p:~p: handle event ~tp\n", [?MODULE, ?LINE, Event]),
     {noreply, State}.
 
 
@@ -382,7 +382,7 @@ table_holder(#holder{callback=Callback, attrs=Attrs, info=Info}=S0) ->
 	stop ->
 	    ok;
 	What ->
-	    io:format("Table holder got ~p~n",[What]),
+	    io:format("Table holder got ~tp~n",[What]),
 	    table_holder(S0)
     end.
 
diff --git a/lib/observer/src/cdv_wx.erl b/lib/observer/src/cdv_wx.erl
index 1e3fb6289e..898f39ded2 100644
--- a/lib/observer/src/cdv_wx.erl
+++ b/lib/observer/src/cdv_wx.erl
@@ -306,7 +306,7 @@ handle_info({'EXIT', Pid, normal}, #state{server=Pid}=State) ->
     {stop, normal, State};
 
 handle_info({'EXIT', Pid, _Reason}, State) ->
-    io:format("Child (~s) crashed exiting:  ~p ~p~n",
+    io:format("Child (~s) crashed exiting:  ~p ~tp~n",
 	      [pid2panel(Pid, State), Pid,_Reason]),
     {stop, normal, State};
 
diff --git a/lib/observer/src/crashdump_viewer.erl b/lib/observer/src/crashdump_viewer.erl
index 8d70f5e2c8..fd8b3b9e67 100644
--- a/lib/observer/src/crashdump_viewer.erl
+++ b/lib/observer/src/crashdump_viewer.erl
@@ -200,13 +200,13 @@ do_script_start(StartFun) ->
 			{'EXIT', Pid, normal} ->
 			    ok;
 			{'EXIT', Pid, Reason} ->
-			    io:format("\ncdv crash: ~p\n",[Reason])
+			    io:format("\ncdv crash: ~tp\n",[Reason])
 		    end;
 		_ ->
 		    io:format("\ncdv crash: ~p\n",[unknown_reason])
 	    end;
 	Error ->
-	    io:format("\ncdv start failed: ~p\n",[Error])
+	    io:format("\ncdv start failed: ~tp\n",[Error])
     end.
 
 usage() ->
@@ -340,7 +340,7 @@ handle_call(general_info,_From,State=#state{file=File}) ->
 handle_call({expand_binary,{Offset,Size,Pos}},_From,State=#state{file=File}) ->
     Fd = open(File),
     pos_bof(Fd,Pos),
-    {Bin,_Line} = get_binary(Offset,Size,val(Fd)),
+    {Bin,_Line} = get_binary(Offset,Size,bytes(Fd)),
     close(Fd),
     {reply,{ok,Bin},State};
 handle_call(procs_summary,_From,State=#state{file=File,wordsize=WS}) ->
@@ -512,9 +512,9 @@ unexpected(_Fd,{eof,_LastLine},_Where) ->
     ok; % truncated file
 unexpected(Fd,{part,What},Where) ->
     skip_rest_of_line(Fd),
-    io:format("WARNING: Found unexpected line in ~s:~n~s ...~n",[Where,What]);
+    io:format("WARNING: Found unexpected line in ~ts:~n~ts ...~n",[Where,What]);
 unexpected(_Fd,What,Where) ->
-    io:format("WARNING: Found unexpected line in ~s:~n~s~n",[Where,What]).
+    io:format("WARNING: Found unexpected line in ~ts:~n~ts~n",[Where,What]).
 
 truncated_warning([]) ->
     [];
@@ -701,9 +701,24 @@ skip(Fd,<<>>) ->
     end.
 
 
-val(Fd) ->
-    val(Fd, "-1").
-val(Fd, NoExist) ->
+string(Fd) ->
+    string(Fd, "-1").
+string(Fd,NoExist) ->
+    case bytes(Fd,noexist) of
+        noexist -> NoExist;
+        Val -> byte_list_to_string(Val)
+    end.
+
+byte_list_to_string(ByteList) ->
+    Bin = list_to_binary(ByteList),
+    case unicode:characters_to_list(Bin) of
+        Str when is_list(Str) -> Str;
+        _ -> ByteList
+    end.
+
+bytes(Fd) ->
+    bytes(Fd, "-1").
+bytes(Fd, NoExist) ->
     case get_rest_of_line(Fd) of
 	{eof,[]} -> NoExist;
 	[] -> NoExist;
@@ -742,7 +757,7 @@ get_lines_to_empty(Fd,<<$\n:8,Bin/binary>>,[],Lines) ->
     put_chunk(Fd,Bin),
     lists:reverse(Lines);
 get_lines_to_empty(Fd,<<$\n:8,Bin/binary>>,Acc,Lines) ->
-    get_lines_to_empty(Fd,Bin,[],[lists:reverse(Acc)|Lines]);
+    get_lines_to_empty(Fd,Bin,[],[byte_list_to_string(lists:reverse(Acc))|Lines]);
 get_lines_to_empty(Fd,<<$\r:8,Bin/binary>>,Acc,Lines) ->
     get_lines_to_empty(Fd,Bin,Acc,Lines);
 get_lines_to_empty(Fd,<<$\s:8,Bin/binary>>,[],Lines) ->
@@ -754,7 +769,7 @@ get_lines_to_empty(Fd,<<>>,Acc,Lines) ->
 	{ok,Bin} ->
 	    get_lines_to_empty(Fd,Bin,Acc,Lines);
 	eof ->
-	    lists:reverse(Lines,[lists:reverse(Acc)])
+	    lists:reverse(Lines,[byte_list_to_string(lists:reverse(Acc))])
     end.
 
 split(Str) ->
@@ -816,7 +831,7 @@ do_read_file(File) ->
 			    {ok,Binaries,DumpVsn};
 			_Other ->
 			    R = io_lib:format(
-				  "~s is not an Erlang crash dump~n",
+				  "~ts is not an Erlang crash dump~n",
 				  [File]),
 			    close(Fd),
 			    {error,R}
@@ -824,20 +839,20 @@ do_read_file(File) ->
 		{ok,<<"<Erlang crash dump>",_Rest/binary>>} -> 
 		    %% old version - no longer supported
 		    R = io_lib:format(
-			  "The crashdump ~s is in the pre-R10B format, "
+			  "The crashdump ~ts is in the pre-R10B format, "
 			  "which is no longer supported.~n",
 			     [File]),
 		    close(Fd),
 		    {error,R};
 		_Other ->
 		    R = io_lib:format(
-			  "~s is not an Erlang crash dump~n",
+			  "~ts is not an Erlang crash dump~n",
 			  [File]),
 		    close(Fd),
 		    {error,R}
 	    end;
 	_other ->
-	    R = io_lib:format("~s is not an Erlang crash dump~n",[File]),
+	    R = io_lib:format("~ts is not an Erlang crash dump~n",[File]),
 	    {error,R}
     end.
 
@@ -986,7 +1001,7 @@ general_info(File) ->
 		    instr_info=InstrInfo}.
 
 get_slogan_and_sysvsn(Fd,Acc) ->
-    case val(Fd,eof) of
+    case string(Fd,eof) of
         "Slogan: " ++ SloganPart when Acc==[] ->
             get_slogan_and_sysvsn(Fd,[SloganPart]);
         "System version: " ++ SystemVsn ->
@@ -1000,14 +1015,14 @@ get_slogan_and_sysvsn(Fd,Acc) ->
 get_general_info(Fd,GenInfo) ->
     case line_head(Fd) of
 	"Compiled" ->
-	    get_general_info(Fd,GenInfo#general_info{compile_time=val(Fd)});
+	    get_general_info(Fd,GenInfo#general_info{compile_time=bytes(Fd)});
 	"Taints" ->
-	    Val = case val(Fd) of "-1" -> "(none)"; Line -> Line end,
+	    Val = case string(Fd) of "-1" -> "(none)"; Line -> Line end,
 	    get_general_info(Fd,GenInfo#general_info{taints=Val});
 	"Atoms" ->
-	    get_general_info(Fd,GenInfo#general_info{num_atoms=val(Fd)});
+	    get_general_info(Fd,GenInfo#general_info{num_atoms=bytes(Fd)});
 	"Calling Thread" ->
-	    get_general_info(Fd,GenInfo#general_info{thread=val(Fd)});
+	    get_general_info(Fd,GenInfo#general_info{thread=bytes(Fd)});
 	"=" ++ _next_tag ->
 	    GenInfo;
 	Other ->
@@ -1068,15 +1083,15 @@ get_proc_details(File,Pid,WS,DumpVsn,Binaries) ->
 get_procinfo(Fd,Fun,Proc,WS) ->
     case line_head(Fd) of
 	"State" ->
-	    State = case val(Fd) of
+	    State = case bytes(Fd) of
 			"Garbing" -> "Garbing\n(limited info)";
 			State0 -> State0
 		    end,
 	    get_procinfo(Fd,Fun,Proc#proc{state=State},WS);
 	"Name" ->
-	    get_procinfo(Fd,Fun,Proc#proc{name=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{name=string(Fd)},WS);
 	"Spawned as" ->
-	    IF = val(Fd),
+	    IF = string(Fd),
 	    case Proc#proc.name of
 		undefined ->
 		    get_procinfo(Fd,Fun,Proc#proc{name=IF,init_func=IF},WS);
@@ -1085,17 +1100,17 @@ get_procinfo(Fd,Fun,Proc,WS) ->
 	    end;
 	"Message queue length" ->
 	    %% stored as integer so we can sort on it
-	    get_procinfo(Fd,Fun,Proc#proc{msg_q_len=list_to_integer(val(Fd))},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{msg_q_len=list_to_integer(bytes(Fd))},WS);
 	"Reductions" ->
 	    %% stored as integer so we can sort on it
-	    get_procinfo(Fd,Fun,Proc#proc{reds=list_to_integer(val(Fd))},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{reds=list_to_integer(bytes(Fd))},WS);
 	"Stack+heap" ->
 	    %% stored as integer so we can sort on it
 	    get_procinfo(Fd,Fun,Proc#proc{stack_heap=
-					  list_to_integer(val(Fd))*WS},WS);
+					  list_to_integer(bytes(Fd))*WS},WS);
 	"Memory" ->
 	    %% stored as integer so we can sort on it
-	    get_procinfo(Fd,Fun,Proc#proc{memory=list_to_integer(val(Fd))},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{memory=list_to_integer(bytes(Fd))},WS);
 	{eof,_} ->
 	    Proc; % truncated file
 	Other ->
@@ -1117,67 +1132,67 @@ all_procinfo(Fd,Fun,Proc,WS,LineHead) ->
     case LineHead of
 	%% - START - moved from get_procinfo -
 	"Spawned by" ->
-	    case val(Fd) of
+	    case bytes(Fd) of
 		"[]" ->
 		    get_procinfo(Fd,Fun,Proc,WS);
 		Parent ->
 		    get_procinfo(Fd,Fun,Proc#proc{parent=Parent},WS)
 	    end;
 	"Started" ->
-	    get_procinfo(Fd,Fun,Proc#proc{start_time=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{start_time=bytes(Fd)},WS);
 	"Last scheduled in for" ->
 	    get_procinfo(Fd,Fun,Proc#proc{current_func=
 					  {"Last scheduled in for",
-					   val(Fd)}},WS);
+					   string(Fd)}},WS);
 	"Current call" ->
 	    get_procinfo(Fd,Fun,Proc#proc{current_func={"Current call",
-							val(Fd)}},WS);
+							string(Fd)}},WS);
 	"Number of heap fragments" ->
-	    get_procinfo(Fd,Fun,Proc#proc{num_heap_frag=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{num_heap_frag=bytes(Fd)},WS);
 	"Heap fragment data" ->
-	    get_procinfo(Fd,Fun,Proc#proc{heap_frag_data=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{heap_frag_data=bytes(Fd)},WS);
 	"OldHeap" ->
-	    Bytes = list_to_integer(val(Fd))*WS,
+	    Bytes = list_to_integer(bytes(Fd))*WS,
 	    get_procinfo(Fd,Fun,Proc#proc{old_heap=Bytes},WS);
 	"Heap unused" ->
-	    Bytes = list_to_integer(val(Fd))*WS,
+	    Bytes = list_to_integer(bytes(Fd))*WS,
 	    get_procinfo(Fd,Fun,Proc#proc{heap_unused=Bytes},WS);
 	"OldHeap unused" ->
-	    Bytes = list_to_integer(val(Fd))*WS,
+	    Bytes = list_to_integer(bytes(Fd))*WS,
 	    get_procinfo(Fd,Fun,Proc#proc{old_heap_unused=Bytes},WS);
 	"New heap start" ->
-	    get_procinfo(Fd,Fun,Proc#proc{new_heap_start=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{new_heap_start=bytes(Fd)},WS);
 	"New heap top" ->
-	    get_procinfo(Fd,Fun,Proc#proc{new_heap_top=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{new_heap_top=bytes(Fd)},WS);
 	"Stack top" ->
-	    get_procinfo(Fd,Fun,Proc#proc{stack_top=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{stack_top=bytes(Fd)},WS);
 	"Stack end" ->
-	    get_procinfo(Fd,Fun,Proc#proc{stack_end=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{stack_end=bytes(Fd)},WS);
 	"Old heap start" ->
-	    get_procinfo(Fd,Fun,Proc#proc{old_heap_start=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{old_heap_start=bytes(Fd)},WS);
 	"Old heap top" ->
-	    get_procinfo(Fd,Fun,Proc#proc{old_heap_top=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{old_heap_top=bytes(Fd)},WS);
 	"Old heap end" ->
-	    get_procinfo(Fd,Fun,Proc#proc{old_heap_end=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{old_heap_end=bytes(Fd)},WS);
 	%% - END - moved from get_procinfo -
 	"Last calls" ->
 	    get_procinfo(Fd,Fun,Proc#proc{last_calls=get_lines_to_empty(Fd)},WS);
 	"Link list" ->
-	    {Links,Monitors,MonitoredBy} = parse_link_list(val(Fd),[],[],[]),
+	    {Links,Monitors,MonitoredBy} = parse_link_list(bytes(Fd),[],[],[]),
 	    get_procinfo(Fd,Fun,Proc#proc{links=Links,
 					  monitors=Monitors,
 					  mon_by=MonitoredBy},WS);
 	"Program counter" ->
-	    get_procinfo(Fd,Fun,Proc#proc{prog_count=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{prog_count=string(Fd)},WS);
 	"CP" ->
-	    get_procinfo(Fd,Fun,Proc#proc{cp=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{cp=string(Fd)},WS);
 	"arity = " ++ Arity ->
 	    %%! Temporary workaround
 	    get_procinfo(Fd,Fun,Proc#proc{arity=Arity--"\r\n"},WS);
 	"Run queue" ->
-	    get_procinfo(Fd,Fun,Proc#proc{run_queue=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{run_queue=string(Fd)},WS);
 	"Internal State" ->
-	    get_procinfo(Fd,Fun,Proc#proc{int_state=val(Fd)},WS);
+	    get_procinfo(Fd,Fun,Proc#proc{int_state=string(Fd)},WS);
 	"=" ++ _next_tag ->
 	    Proc;
 	Other ->
@@ -1204,7 +1219,7 @@ parse_link_list(", "++Rest,Links,Monitors,MonitoredBy) ->
 parse_link_list([],Links,Monitors,MonitoredBy) ->
     {lists:reverse(Links),lists:reverse(Monitors),lists:reverse(MonitoredBy)};
 parse_link_list(Unexpected,Links,Monitors,MonitoredBy) ->
-    io:format("WARNING: found unexpected data in link list:~n~s~n",[Unexpected]),
+    io:format("WARNING: found unexpected data in link list:~n~ts~n",[Unexpected]),
     parse_link_list([],Links,Monitors,MonitoredBy).
 
 
@@ -1363,7 +1378,7 @@ read_stack_dump(Fd,Pid,BinAddrAdj,Dict) ->
     end.
 read_stack_dump1(Fd,BinAddrAdj,Dict,Acc) ->
     %% This function is never called if the dump is truncated in {?proc_heap,Pid}
-    case val(Fd) of
+    case bytes(Fd) of
 	"=" ++ _next_tag ->
 	    lists:reverse(Acc);
 	Line ->
@@ -1391,7 +1406,7 @@ read_messages(Fd,Pid,BinAddrAdj,Dict) ->
     end.
 read_messages1(Fd,BinAddrAdj,Dict,Acc) ->
     %% This function is never called if the dump is truncated in {?proc_heap,Pid}
-    case val(Fd) of
+    case bytes(Fd) of
 	"=" ++ _next_tag ->
 	    lists:reverse(Acc);
 	Line ->
@@ -1419,7 +1434,7 @@ read_dictionary(Fd,Pid,BinAddrAdj,Dict) ->
     end.
 read_dictionary1(Fd,BinAddrAdj,Dict,Acc) ->
     %% This function is never called if the dump is truncated in {?proc_heap,Pid}
-    case val(Fd) of
+    case bytes(Fd) of
 	"=" ++ _next_tag ->
 	    lists:reverse(Acc);
 	Line ->
@@ -1451,7 +1466,7 @@ read_heap(BinAddrAdj,Dict0) ->
 	end_of_heap ->
 	    Dict0;
 	Fd ->
-	    case val(Fd) of
+	    case bytes(Fd) of
 		"=" ++ _next_tag ->
 		    put(fd, end_of_heap),
 		    Dict0;
@@ -1498,42 +1513,42 @@ get_portinfo(Fd,Port) ->
     case line_head(Fd) of
 	"Slot" ->
 	    %% stored as integer so we can sort on it
-	    get_portinfo(Fd,Port#port{slot=list_to_integer(val(Fd))});
+	    get_portinfo(Fd,Port#port{slot=list_to_integer(bytes(Fd))});
 	"Connected" ->
 	    %% stored as pid so we can sort on it
-	    Connected0 = val(Fd),
+	    Connected0 = bytes(Fd),
 	    Connected =
 		try list_to_pid(Connected0)
 		catch error:badarg -> Connected0
 		end,
 	    get_portinfo(Fd,Port#port{connected=Connected});
 	"Links" ->
-	    Pids = split_pid_list_no_space(val(Fd)),
+	    Pids = split_pid_list_no_space(bytes(Fd)),
 	    Links = [{Pid,Pid} || Pid <- Pids],
 	    get_portinfo(Fd,Port#port{links=Links});
 	"Registered as" ->
-	    get_portinfo(Fd,Port#port{name=val(Fd)});
+	    get_portinfo(Fd,Port#port{name=string(Fd)});
 	"Monitors" ->
-	    Monitors0 = string:tokens(val(Fd),"()"),
+	    Monitors0 = string:tokens(bytes(Fd),"()"),
 	    Monitors = [begin
 			    [Pid,Ref] = string:tokens(Mon,","),
 			    {Pid,Pid++" ("++Ref++")"}
 			end || Mon <- Monitors0],
 	    get_portinfo(Fd,Port#port{monitors=Monitors});
 	"Port controls linked-in driver" ->
-	    Str = lists:flatten(["Linked in driver: " | val(Fd)]),
+	    Str = lists:flatten(["Linked in driver: " | string(Fd)]),
 	    get_portinfo(Fd,Port#port{controls=Str});
 	"Port controls forker process" ->
-	    Str = lists:flatten(["Forker process: " | val(Fd)]),
+	    Str = lists:flatten(["Forker process: " | string(Fd)]),
 	    get_portinfo(Fd,Port#port{controls=Str});
 	"Port controls external process" ->
-	    Str = lists:flatten(["External proc: " | val(Fd)]),
+	    Str = lists:flatten(["External proc: " | string(Fd)]),
 	    get_portinfo(Fd,Port#port{controls=Str});
 	"Port is a file" ->
-	    Str = lists:flatten(["File: "| val(Fd)]),
+	    Str = lists:flatten(["File: "| string(Fd)]),
 	    get_portinfo(Fd,Port#port{controls=Str});
 	"Port is UNIX fd not opened by emulator" ->
-	    Str = lists:flatten(["UNIX fd not opened by emulator: "| val(Fd)]),
+	    Str = lists:flatten(["UNIX fd not opened by emulator: "| string(Fd)]),
 	    get_portinfo(Fd,Port#port{controls=Str});
 	"=" ++ _next_tag ->
 	    Port;
@@ -1566,23 +1581,23 @@ tab_is_named(#ets_table{}) -> "no".
 get_etsinfo(Fd,EtsTable = #ets_table{details=Ds},WS) ->
     case line_head(Fd) of
 	"Slot" ->
-	    get_etsinfo(Fd,EtsTable#ets_table{slot=list_to_integer(val(Fd))},WS);
+	    get_etsinfo(Fd,EtsTable#ets_table{slot=list_to_integer(bytes(Fd))},WS);
 	"Table" ->
-	    get_etsinfo(Fd,EtsTable#ets_table{id=val(Fd)},WS);
+	    get_etsinfo(Fd,EtsTable#ets_table{id=string(Fd)},WS);
 	"Name" ->
-	    get_etsinfo(Fd,EtsTable#ets_table{name=val(Fd)},WS);
+	    get_etsinfo(Fd,EtsTable#ets_table{name=string(Fd)},WS);
 	"Ordered set (AVL tree), Elements" ->
 	    skip_rest_of_line(Fd),
 	    get_etsinfo(Fd,EtsTable#ets_table{data_type="tree"},WS);
 	"Buckets" ->
 	    %% A bug in erl_db_hash.c prints a space after the buckets
 	    %% - need to strip the string to make list_to_integer/1 happy.
-	    Buckets = list_to_integer(string:strip(val(Fd))),
+	    Buckets = list_to_integer(string:strip(bytes(Fd))),
 	    get_etsinfo(Fd,EtsTable#ets_table{buckets=Buckets},WS);
 	"Objects" ->
-	    get_etsinfo(Fd,EtsTable#ets_table{size=list_to_integer(val(Fd))},WS);
+	    get_etsinfo(Fd,EtsTable#ets_table{size=list_to_integer(bytes(Fd))},WS);
 	"Words" ->
-	    Words = list_to_integer(val(Fd)),
+	    Words = list_to_integer(bytes(Fd)),
 	    Bytes = 
 		case Words of
 		    -1 -> -1; % probably truncated
@@ -1592,37 +1607,37 @@ get_etsinfo(Fd,EtsTable = #ets_table{details=Ds},WS) ->
 	"=" ++ _next_tag ->
 	    EtsTable;
 	"Chain Length Min" ->
-	    Val = val(Fd),
+	    Val = bytes(Fd),
 	    get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{chain_min=>Val}},WS);
 	"Chain Length Avg" ->
-	    Val = try list_to_float(string:strip(val(Fd))) catch _:_ -> "-" end,
+	    Val = try list_to_float(string:strip(bytes(Fd))) catch _:_ -> "-" end,
 	    get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{chain_avg=>Val}},WS);
 	"Chain Length Max" ->
-	    Val = val(Fd),
+	    Val = bytes(Fd),
 	    get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{chain_max=>Val}},WS);
 	"Chain Length Std Dev" ->
-	    Val = val(Fd),
+	    Val = bytes(Fd),
 	    get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{chain_stddev=>Val}},WS);
 	"Chain Length Expected Std Dev" ->
-	    Val = val(Fd),
+	    Val = bytes(Fd),
 	    get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{chain_exp_stddev=>Val}},WS);
 	"Fixed" ->
-	    Val = val(Fd),
+	    Val = bytes(Fd),
 	    get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{fixed=>Val}},WS);
 	"Type" ->
-	    Val = val(Fd),
+	    Val = bytes(Fd),
 	    get_etsinfo(Fd,EtsTable#ets_table{data_type=Val},WS);
 	"Protection" ->
-	    Val = val(Fd),
+	    Val = bytes(Fd),
 	    get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{protection=>Val}},WS);
 	"Compressed" ->
-	    Val = val(Fd),
+	    Val = bytes(Fd),
 	    get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{compressed=>Val}},WS);
 	"Write Concurrency" ->
-	    Val = val(Fd),
+	    Val = bytes(Fd),
 	    get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{write_c=>Val}},WS);
 	"Read Concurrency" ->
-	    Val = val(Fd),
+	    Val = bytes(Fd),
 	    get_etsinfo(Fd,EtsTable#ets_table{details=Ds#{read_c=>Val}},WS);
 	Other ->
 	    unexpected(Fd,Other,"ETS info"),
@@ -1672,9 +1687,9 @@ get_timerinfo(Fd,Id) ->
 get_timerinfo_1(Fd,Timer) ->
     case line_head(Fd) of
 	"Message" ->
-	    get_timerinfo_1(Fd,Timer#timer{msg=val(Fd)});
+	    get_timerinfo_1(Fd,Timer#timer{msg=string(Fd)});
 	"Time left" ->
-	    TimeLeft = list_to_integer(val(Fd) -- " ms"),
+	    TimeLeft = list_to_integer(bytes(Fd) -- " ms"),
 	    get_timerinfo_1(Fd,Timer#timer{time=TimeLeft});
 	"=" ++ _next_tag ->
 	    Timer;
@@ -1743,37 +1758,37 @@ get_nodeinfo(Fd,Channel,Type,Start) ->
 get_nodeinfo(Fd,Nod) ->
     case line_head(Fd) of
 	"Name" ->
-	    get_nodeinfo(Fd,Nod#nod{name=val(Fd)});
+	    get_nodeinfo(Fd,Nod#nod{name=bytes(Fd)});
 	"Controller" ->
-	    get_nodeinfo(Fd,Nod#nod{controller=val(Fd)});
+	    get_nodeinfo(Fd,Nod#nod{controller=bytes(Fd)});
 	"Creation" ->
 	    %% Throwing away elements like "(refc=1)", which might be
 	    %% printed from a debug compiled emulator.
 	    Creations = lists:flatmap(fun(C) -> try [list_to_integer(C)]
 						catch error:badarg -> []
 						end
-				      end, string:tokens(val(Fd)," ")),
+				      end, string:tokens(bytes(Fd)," ")),
 	    get_nodeinfo(Fd,Nod#nod{creation={creations,Creations}});
 	"Remote link" ->
-	    Procs = val(Fd), % e.g. "<0.31.0> <4322.54.0>"
+	    Procs = bytes(Fd), % e.g. "<0.31.0> <4322.54.0>"
 	    {Local,Remote} = split(Procs),
 	    Str = Local++" <-> "++Remote,
 	    NewRemLinks = [{Local,Str} | Nod#nod.remote_links],
 	    get_nodeinfo(Fd,Nod#nod{remote_links=NewRemLinks});
 	"Remote monitoring" ->
-	    Procs = val(Fd), % e.g. "<0.31.0> <4322.54.0>"
+	    Procs = bytes(Fd), % e.g. "<0.31.0> <4322.54.0>"
 	    {Local,Remote} = split(Procs),
 	    Str = Local++" -> "++Remote,
 	    NewRemMon = [{Local,Str} | Nod#nod.remote_mon],
 	    get_nodeinfo(Fd,Nod#nod{remote_mon=NewRemMon});
 	"Remotely monitored by" ->
-	    Procs = val(Fd), % e.g. "<0.31.0> <4322.54.0>"
+	    Procs = bytes(Fd), % e.g. "<0.31.0> <4322.54.0>"
 	    {Local,Remote} = split(Procs),
 	    Str = Local++" <- "++Remote,
 	    NewRemMonBy = [{Local,Str} | Nod#nod.remote_mon_by],
 	    get_nodeinfo(Fd,Nod#nod{remote_mon_by=NewRemMonBy});
 	"Error" ->
-	    get_nodeinfo(Fd,Nod#nod{error="ERROR: "++val(Fd)});
+	    get_nodeinfo(Fd,Nod#nod{error="ERROR: "++string(Fd)});
 	"=" ++ _next_tag ->
 	    Nod;
 	Other ->
@@ -1817,9 +1832,9 @@ loaded_mods(File) ->
 get_loaded_mod_totals(Fd,{CC,OC}) ->
     case line_head(Fd) of
 	"Current code" ->
-	    get_loaded_mod_totals(Fd,{val(Fd),OC});
+	    get_loaded_mod_totals(Fd,{bytes(Fd),OC});
 	"Old code" ->
-	    get_loaded_mod_totals(Fd,{CC,val(Fd)});
+	    get_loaded_mod_totals(Fd,{CC,bytes(Fd)});
 	"=" ++ _next_tag ->
 	    {CC,OC};
 	Other ->
@@ -1830,10 +1845,10 @@ get_loaded_mod_totals(Fd,{CC,OC}) ->
 get_loaded_mod_info(Fd,LM,Fun) ->
     case line_head(Fd) of
 	"Current size" ->
-	    CS = list_to_integer(val(Fd)),
+	    CS = list_to_integer(bytes(Fd)),
 	    get_loaded_mod_info(Fd,LM#loaded_mod{current_size=CS},Fun);
 	"Old size" ->
-	    OS = list_to_integer(val(Fd)),
+	    OS = list_to_integer(bytes(Fd)),
 	    get_loaded_mod_info(Fd,LM#loaded_mod{old_size=OS},Fun);
 	"=" ++ _next_tag ->
 	    LM;
@@ -1849,16 +1864,16 @@ main_modinfo(_Fd,LM,_LineHead) ->
 all_modinfo(Fd,LM,LineHead) ->
     case LineHead of
 	"Current attributes" ->
-	    Str = hex_to_str(val(Fd,"")),
+	    Str = hex_to_str(bytes(Fd,"")),
 	    LM#loaded_mod{current_attrib=Str};
 	"Current compilation info" ->
-	    Str = hex_to_str(val(Fd,"")),
+	    Str = hex_to_str(bytes(Fd,"")),
 	    LM#loaded_mod{current_comp_info=Str};
 	"Old attributes" ->
-	    Str = hex_to_str(val(Fd,"")),
+	    Str = hex_to_str(bytes(Fd,"")),
 	    LM#loaded_mod{old_attrib=Str};
 	"Old compilation info" ->
-	    Str = hex_to_str(val(Fd,"")),
+	    Str = hex_to_str(bytes(Fd,"")),
 	    LM#loaded_mod{old_comp_info=Str};
 	Other ->
 	    unexpected(Fd,Other,"loaded modules info"),
@@ -1868,7 +1883,7 @@ all_modinfo(Fd,LM,LineHead) ->
 
 hex_to_str(Hex) ->
     Term = hex_to_term(Hex,[]),
-    io_lib:format("~p~n",[Term]).
+    io_lib:format("~tp~n",[Term]).
 
 hex_to_term([X,Y|Hex],Acc) ->
     MS = hex_to_dec([X]),
@@ -1909,17 +1924,17 @@ funs(File) ->
 get_funinfo(Fd,Fu) ->
     case line_head(Fd) of
 	"Module" ->
-	    get_funinfo(Fd,Fu#fu{module=val(Fd)});
+	    get_funinfo(Fd,Fu#fu{module=bytes(Fd)});
 	"Uniq" ->
-	    get_funinfo(Fd,Fu#fu{uniq=list_to_integer(val(Fd))});
+	    get_funinfo(Fd,Fu#fu{uniq=list_to_integer(bytes(Fd))});
 	"Index" ->
-	    get_funinfo(Fd,Fu#fu{index=list_to_integer(val(Fd))});
+	    get_funinfo(Fd,Fu#fu{index=list_to_integer(bytes(Fd))});
 	"Address" ->
-	    get_funinfo(Fd,Fu#fu{address=val(Fd)});
+	    get_funinfo(Fd,Fu#fu{address=bytes(Fd)});
 	"Native_address" ->
-	    get_funinfo(Fd,Fu#fu{native_address=val(Fd)});
+	    get_funinfo(Fd,Fu#fu{native_address=bytes(Fd)});
 	"Refc" ->
-	    get_funinfo(Fd,Fu#fu{refc=list_to_integer(val(Fd))});
+	    get_funinfo(Fd,Fu#fu{refc=list_to_integer(bytes(Fd))});
 	"=" ++ _next_tag ->
 	    Fu;
 	Other ->
@@ -1999,7 +2014,7 @@ get_meminfo(Fd,Acc) ->
 	{eof,_last_line} ->
 	    lists:reverse(Acc);
 	Key ->
-	    get_meminfo(Fd,[{list_to_atom(Key),val(Fd)}|Acc])
+	    get_meminfo(Fd,[{list_to_atom(Key),bytes(Fd)}|Acc])
     end.
 
 %%-----------------------------------------------------------------
@@ -2023,7 +2038,7 @@ get_allocareainfo(Fd,Acc) ->
 	{eof,_last_line} ->
 	    lists:reverse(Acc);
 	Key ->
-	    Val = val(Fd),
+	    Val = bytes(Fd),
 	    AllocInfo =
 		case split(Val) of
 		    {Alloc,[]} ->
@@ -2061,7 +2076,7 @@ get_allocatorinfo1(Fd,Acc,Max) ->
 	{eof,_last_line} ->
 	    pad_and_reverse(Acc,Max,[]);
 	Key ->
-	    Values = get_all_vals(val(Fd),[]),
+	    Values = get_all_vals(bytes(Fd),[]),
 	    L = length(Values),
 	    Max1 = if L > Max -> L; true -> Max end,
 	    get_allocatorinfo1(Fd,[{Key,Values}|Acc],Max1)
@@ -2316,13 +2331,13 @@ get_hashtableinfo(Fd,Name,Start) ->
 get_hashtableinfo1(Fd,HashTable) ->
     case line_head(Fd) of
 	"size" ->
-	    get_hashtableinfo1(Fd,HashTable#hash_table{size=val(Fd)});
+	    get_hashtableinfo1(Fd,HashTable#hash_table{size=bytes(Fd)});
 	"used" ->
-	    get_hashtableinfo1(Fd,HashTable#hash_table{used=val(Fd)});
+	    get_hashtableinfo1(Fd,HashTable#hash_table{used=bytes(Fd)});
 	"objs" ->
-	    get_hashtableinfo1(Fd,HashTable#hash_table{objs=val(Fd)});
+	    get_hashtableinfo1(Fd,HashTable#hash_table{objs=bytes(Fd)});
 	"depth" ->
-	    get_hashtableinfo1(Fd,HashTable#hash_table{depth=val(Fd)});
+	    get_hashtableinfo1(Fd,HashTable#hash_table{depth=bytes(Fd)});
     	"=" ++ _next_tag ->
 	    HashTable;
 	Other ->
@@ -2353,15 +2368,15 @@ get_indextableinfo(Fd,Name,Start) ->
 get_indextableinfo1(Fd,IndexTable) ->
     case line_head(Fd) of
 	"size" ->
-	    get_indextableinfo1(Fd,IndexTable#index_table{size=val(Fd)});
+	    get_indextableinfo1(Fd,IndexTable#index_table{size=bytes(Fd)});
 	"used" ->
-	    get_indextableinfo1(Fd,IndexTable#index_table{used=val(Fd)});
+	    get_indextableinfo1(Fd,IndexTable#index_table{used=bytes(Fd)});
 	"limit" ->
-	    get_indextableinfo1(Fd,IndexTable#index_table{limit=val(Fd)});
+	    get_indextableinfo1(Fd,IndexTable#index_table{limit=bytes(Fd)});
 	"rate" ->
-	    get_indextableinfo1(Fd,IndexTable#index_table{rate=val(Fd)});
+	    get_indextableinfo1(Fd,IndexTable#index_table{rate=bytes(Fd)});
 	"entries" ->
-	    get_indextableinfo1(Fd,IndexTable#index_table{entries=val(Fd)});
+	    get_indextableinfo1(Fd,IndexTable#index_table{entries=bytes(Fd)});
     	"=" ++ _next_tag ->
 	    IndexTable;
 	Other ->
@@ -2393,45 +2408,45 @@ get_schedulerinfo(Fd,Name,Start) ->
 get_schedulerinfo1(Fd,Sched=#sched{details=Ds}) ->
     case line_head(Fd) of
 	"Current Process" ->
-	    get_schedulerinfo1(Fd,Sched#sched{process=val(Fd, "None")});
+	    get_schedulerinfo1(Fd,Sched#sched{process=bytes(Fd, "None")});
 	"Current Port" ->
-	    get_schedulerinfo1(Fd,Sched#sched{port=val(Fd, "None")});
+	    get_schedulerinfo1(Fd,Sched#sched{port=bytes(Fd, "None")});
 	"Run Queue Max Length" ->
-	    RQMax = list_to_integer(val(Fd)),
+	    RQMax = list_to_integer(bytes(Fd)),
 	    RQ = RQMax + Sched#sched.run_q,
 	    get_schedulerinfo1(Fd,Sched#sched{run_q=RQ, details=Ds#{runq_max=>RQMax}});
 	"Run Queue High Length" ->
-	    RQHigh = list_to_integer(val(Fd)),
+	    RQHigh = list_to_integer(bytes(Fd)),
 	    RQ = RQHigh + Sched#sched.run_q,
 	    get_schedulerinfo1(Fd,Sched#sched{run_q=RQ, details=Ds#{runq_high=>RQHigh}});
 	"Run Queue Normal Length" ->
-	    RQNorm = list_to_integer(val(Fd)),
+	    RQNorm = list_to_integer(bytes(Fd)),
 	    RQ = RQNorm + Sched#sched.run_q,
 	    get_schedulerinfo1(Fd,Sched#sched{run_q=RQ, details=Ds#{runq_norm=>RQNorm}});
 	"Run Queue Low Length" ->
-	    RQLow = list_to_integer(val(Fd)),
+	    RQLow = list_to_integer(bytes(Fd)),
 	    RQ = RQLow + Sched#sched.run_q,
 	    get_schedulerinfo1(Fd,Sched#sched{run_q=RQ, details=Ds#{runq_low=>RQLow}});
 	"Run Queue Port Length" ->
-	    RQ = list_to_integer(val(Fd)),
+	    RQ = list_to_integer(bytes(Fd)),
 	    get_schedulerinfo1(Fd,Sched#sched{port_q=RQ});
 
 	"Scheduler Sleep Info Flags" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{sleep_info=>val(Fd, "None")}});
+	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{sleep_info=>bytes(Fd, "None")}});
 	"Scheduler Sleep Info Aux Work" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{sleep_aux=>val(Fd, "None")}});
+	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{sleep_aux=>bytes(Fd, "None")}});
 
 	"Run Queue Flags" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{runq_flags=>val(Fd, "None")}});
+	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{runq_flags=>bytes(Fd, "None")}});
 
 	"Current Process State" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_state=>val(Fd)}});
+	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_state=>bytes(Fd)}});
 	"Current Process Internal State" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_int_state=>val(Fd)}});
+	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_int_state=>bytes(Fd)}});
 	"Current Process Program counter" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_prg_cnt=>val(Fd)}});
+	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_prg_cnt=>string(Fd)}});
 	"Current Process CP" ->
-	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_cp=>val(Fd)}});
+	    get_schedulerinfo1(Fd,Sched#sched{details=Ds#{currp_cp=>string(Fd)}});
 	"Current Process Limited Stack Trace" ->
 	    %% If there shall be last in scheduler information block
 	    Sched#sched{details=get_limited_stack(Fd, 0, Ds)};
@@ -2443,7 +2458,7 @@ get_schedulerinfo1(Fd,Sched=#sched{details=Ds}) ->
     end.
 
 get_limited_stack(Fd, N, Ds) ->
-    case val(Fd) of
+    case string(Fd) of
 	Addr = "0x" ++ _ ->
 	    get_limited_stack(Fd, N+1, Ds#{{currp_stack, N} => Addr});
 	"=" ++ _next_tag ->
@@ -2595,7 +2610,7 @@ skip_dist_ext([C|Cs], KeptCs) ->
 parse_atom([$A|Line0], D) ->
     {N,":"++Line1} = get_hex(Line0),
     {Chars, Line} = get_chars(N, Line1),
-    {list_to_atom(Chars), Line, D}.
+    {binary_to_atom(list_to_binary(Chars),utf8), Line, D}.
 
 parse_atom_translation_table(0, Line0, As) ->
     {list_to_tuple(lists:reverse(As)), Line0};
@@ -2614,7 +2629,7 @@ deref_ptr(Ptr, Line, BinAddrAdj, D0) ->
 		end_of_heap ->
 		    {['#CDVIncompleteHeap'],Line,D0};
 		Fd ->
-		    case val(Fd) of
+		    case bytes(Fd) of
 			"="++_ ->
 			    put(fd, end_of_heap),
 			    deref_ptr(Ptr, Line, BinAddrAdj, D0);
@@ -2759,7 +2774,7 @@ tag_to_atom("scheduler") -> ?scheduler;
 tag_to_atom("timer") -> ?timer;
 tag_to_atom("visible_node") -> ?visible_node;
 tag_to_atom(UnknownTag) ->
-    io:format("WARNING: Found unexpected tag:~s~n",[UnknownTag]),
+    io:format("WARNING: Found unexpected tag:~ts~n",[UnknownTag]),
     list_to_atom(UnknownTag).
 
 %%%-----------------------------------------------------------------
diff --git a/lib/observer/src/etop_tr.erl b/lib/observer/src/etop_tr.erl
index 8e43f8bb35..1e48fefca4 100644
--- a/lib/observer/src/etop_tr.erl
+++ b/lib/observer/src/etop_tr.erl
@@ -89,14 +89,14 @@ handle_data(Last, {_, Pid, out, _, Time2} = G, Store) ->
              end,
              New;
          false ->
-             io:format("Erlang top got garbage ~p~n", [G]),
+             io:format("Erlang top got garbage ~tp~n", [G]),
              Last
     end;
 handle_data(_W, {drop, D}, _) ->  %% Error case we are missing data here!
     io:format("Erlang top dropped data ~p~n", [D]),
     [];
 handle_data(Last, G, _) ->
-    io:format("Erlang top got garbage ~p~n", [G]),
+    io:format("Erlang top got garbage ~tp~n", [G]),
     Last.
 
 elapsed({Me1, S1, Mi1}, {Me2, S2, Mi2}) ->
diff --git a/lib/observer/src/etop_txt.erl b/lib/observer/src/etop_txt.erl
index 183641119a..cd3ec62c13 100644
--- a/lib/observer/src/etop_txt.erl
+++ b/lib/observer/src/etop_txt.erl
@@ -48,7 +48,6 @@ do_update(Prev,Config) ->
     do_update(standard_io,Info,Prev,Config).
 
 do_update(Fd,Info,Prev,Config) ->
-    Encoding = encoding(Fd),
     {Cpu,NProcs,RQ,Clock} = loadinfo(Info,Prev),
     io:nl(Fd),
     writedoubleline(Fd),
@@ -72,7 +71,7 @@ do_update(Fd,Info,Prev,Config) ->
     io:nl(Fd),
     writepinfo_header(Fd),
     writesingleline(Fd),
-    writepinfo(Fd,Info#etop_info.procinfo,Encoding),
+    writepinfo(Fd,Info#etop_info.procinfo,modifier(Fd)),
     writedoubleline(Fd),
     io:nl(Fd),
     Info.
@@ -93,26 +92,27 @@ writepinfo(Fd,[#etop_proc_info{pid=Pid,
 			       cf=MFA,
 			       mq=MQ}
 	       |T],
-           Encoding) ->
-    io:fwrite(Fd,proc_format(Encoding),
-              [Pid,to_list(Name,Encoding),Time,Reds,Mem,MQ,
-               formatmfa(MFA,Encoding)]),
-    writepinfo(Fd,T,Encoding);
+           Modifier) ->
+    io:fwrite(Fd,proc_format(Modifier),
+              [Pid,to_string(Name,Modifier),Time,Reds,Mem,MQ,
+               to_string(MFA,Modifier)]),
+    writepinfo(Fd,T,Modifier);
 writepinfo(_Fd,[],_) ->
     ok.
 
+proc_format(Modifier) ->
+    "~-15w~-20"++Modifier++"s~8w~8w~8w~8w ~-20"++Modifier++"s~n".
 
-formatmfa({M, F, A},latin1) ->
-    io_lib:format("~w:~w/~w",[M, F, A]);
-formatmfa({M, F, A},_) ->
-    io_lib:format("~w:~tw/~w",[M, F, A]);
-formatmfa(Other,_) ->
-    %% E.g. when running hipe - the current_function for some
-    %% processes will be 'undefined'
-    io_lib:format("~w",[Other]).
+to_string({M,F,A},Modifier) ->
+    io_lib:format("~w:~"++Modifier++"w/~w",[M,F,A]);
+to_string(Other,Modifier) ->
+    io_lib:format("~"++Modifier++"w",[Other]).
 
-to_list(Name,_) when is_atom(Name) -> atom_to_list(Name);
-to_list({_M,_F,_A}=MFA,Encoding) -> formatmfa(MFA,Encoding).
+modifier(Device) ->
+    case encoding(Device) of
+        latin1 -> "";
+        _ -> "t"
+    end.
 
 encoding(Device) ->
     case io:getopts(Device) of
@@ -122,7 +122,3 @@ encoding(Device) ->
             latin1
     end.
 
-proc_format(latin1) ->
-    "~-15w~-20s~8w~8w~8w~8w ~-20s~n";
-proc_format(_) ->
-    "~-15w~-20ts~8w~8w~8w~8w ~-20ts~n".
diff --git a/lib/observer/src/multitrace.erl b/lib/observer/src/multitrace.erl
index a01eeec6ae..82aec05e0d 100644
--- a/lib/observer/src/multitrace.erl
+++ b/lib/observer/src/multitrace.erl
@@ -103,16 +103,16 @@ print_func(Out,{trace_ts,P,call,{M,F,A},C,Ts},N) ->
     io:format(Out,
 	      "~w: ~s~n"
 	      "Process   : ~w~n"
-	      "Call      : ~w:~w/~w~n"
-	      "Arguments : ~p~n"
-	      "Caller    : ~w~n~n",
+	      "Call      : ~w:~tw/~w~n"
+	      "Arguments : ~tp~n"
+	      "Caller    : ~tw~n~n",
 	      [N,ts(Ts),P,M,F,length(A),A,C]);
 print_func(Out,{trace_ts,P,return_from,{M,F,A},R,Ts},N) ->
     io:format(Out,
 	      "~w: ~s~n"
 	      "Process      : ~w~n"
-	      "Return from  : ~w:~w/~w~n"
-	      "Return value : ~p~n~n",
+	      "Return from  : ~w:~tw/~w~n"
+	      "Return value : ~tp~n~n",
 	      [N,ts(Ts),P,M,F,A,R]).
 
 
@@ -181,7 +181,7 @@ handle_schedule(Out,{trace_ts,P,out,Info,Ts},_TI,S) ->
 	      "out:~n"
 	      "Process  : ~w~n"
 	      "Time     : ~s~n"
-	      "Function : ~w~n~n",[P,ts(Ts),Info]),
+	      "Function : ~tw~n~n",[P,ts(Ts),Info]),
     case lists:keysearch(P,1,S) of
 	{value,{P,List}} ->
 	    lists:keyreplace(P,1,S,{P,[{out,Ts}|List]});
@@ -193,7 +193,7 @@ handle_schedule(Out,{trace_ts,P,in,Info,Ts},_TI,S) ->
 	      "in:~n"
 	      "Process  : ~w~n"
 	      "Time     : ~s~n"
-	      "Function : ~w~n~n",[P,ts(Ts),Info]),
+	      "Function : ~tw~n~n",[P,ts(Ts),Info]),
     case lists:keysearch(P,1,S) of
 	{value,{P,List}} ->
 	    lists:keyreplace(P,1,S,{P,[{in,Ts}|List]});
diff --git a/lib/observer/src/observer_alloc_wx.erl b/lib/observer/src/observer_alloc_wx.erl
index ef425f0874..7f4b3dd484 100644
--- a/lib/observer/src/observer_alloc_wx.erl
+++ b/lib/observer/src/observer_alloc_wx.erl
@@ -80,7 +80,7 @@ init([Notebook, Parent, Config]) ->
 		     }
 	}
     catch _:Err ->
-	    io:format("~p crashed ~p: ~p~n",[?MODULE, Err, erlang:get_stacktrace()]),
+	    io:format("~p crashed ~tp: ~tp~n",[?MODULE, Err, erlang:get_stacktrace()]),
 	    {stop, Err}
     end.
 
@@ -183,7 +183,7 @@ handle_info({'EXIT', Old, _}, State = #state{appmon=Old}) ->
     {noreply, State#state{active=false, appmon=undefined}};
 
 handle_info(_Event, State) ->
-    %% io:format("~p:~p: ~p~n",[?MODULE,?LINE,_Event]),
+    %% io:format("~p:~p: ~tp~n",[?MODULE,?LINE,_Event]),
     {noreply, State}.
 
 terminate(_Event, #state{}) ->
diff --git a/lib/observer/src/observer_app_wx.erl b/lib/observer/src/observer_app_wx.erl
index bc4f1fe117..2a481966da 100644
--- a/lib/observer/src/observer_app_wx.erl
+++ b/lib/observer/src/observer_app_wx.erl
@@ -320,7 +320,7 @@ handle_info({'EXIT', _, noconnection}, State) ->
 handle_info({'EXIT', _, normal}, State) ->
     {noreply, State};
 handle_info(_Event, State) ->
-    %% io:format("~p:~p: ~p~n",[?MODULE,?LINE,_Event]),
+    %% io:format("~p:~p: ~tp~n",[?MODULE,?LINE,_Event]),
     {noreply, State}.
 
 %%%%%%%%%%
diff --git a/lib/observer/src/observer_html_lib.erl b/lib/observer/src/observer_html_lib.erl
index 1f1306c370..3dfcc42ada 100644
--- a/lib/observer/src/observer_html_lib.erl
+++ b/lib/observer/src/observer_html_lib.erl
@@ -142,13 +142,13 @@ dict_table(Tab,{Key0,Value0}, Even) ->
     tr(color(Even), [td("VALIGN=center",pre(Key)), td(pre(Value))]).
 
 proc_state(Tab,{Key0,Value0}, Even) ->
-    Key = lists:flatten(io_lib:format("~s",[Key0])),
+    Key = lists:flatten(io_lib:format("~ts",[Key0])),
     Value = all_or_expand(Tab,Value0),
     tr(color(Even), [td("VALIGN=center",Key), td(pre(Value))]).
 
 all_or_expand(Tab,Term) ->
-    Preview = io_lib:format("~P",[Term,8]),
-    Check = io_lib:format("~P",[Term,100]),
+    Preview = io_lib:format("~tP",[Term,8]),
+    Check = io_lib:format("~tP",[Term,100]),
     Exp = Preview=/=Check,
     all_or_expand(Tab,Term,Preview,Exp).
 all_or_expand(_Tab,Term,Str,false)
@@ -166,13 +166,8 @@ all_or_expand(Tab,Term,Preview,true)
 	  "Click to expand above term")];
 all_or_expand(Tab,Bin,_PreviewStr,_Expand)
   when is_binary(Bin) ->
-    Size = byte_size(Bin),
-    PrevSize = min(Size, 10) * 8,
-    <<Preview:PrevSize, _/binary>> = Bin,
-    Hash = erlang:phash2(Bin),
-    Key = {Preview, Size, Hash},
-    ets:insert(Tab,{Key,Bin}),
-    Term = io_lib:format("~p", [['#OBSBin',Preview,Size,Hash]]),
+    OBSBin = observer_lib:make_obsbin(Bin,Tab),
+    Term = io_lib:format("~tp", [OBSBin]),
     href_proc_port(lists:flatten(Term), true).
 
 color(true) -> io_lib:format("BGCOLOR=\"#~2.16.0B~2.16.0B~2.16.0B\"", tuple_to_list(?BG_EVEN));
@@ -339,9 +334,11 @@ href_proc_bin(From, T, Acc, LTB) ->
     BinStr =
 	case string:tokens(OffsetSizePos,",.| \n") of
 	    [Offset,SizeStr,Pos] when From =:= cdv ->
-		Id = {list_to_integer(Offset),10,list_to_integer(Pos)},
+                Size = list_to_integer(SizeStr),
+                PreviewSize = min(Size,10),
+		Id = {list_to_integer(Offset),PreviewSize,list_to_integer(Pos)},
 		{ok,PreviewBin} = crashdump_viewer:expand_binary(Id),
-		PreviewStr = preview_string(list_to_integer(SizeStr), PreviewBin),
+		PreviewStr = preview_string(Size, PreviewBin),
 		if LTB ->
 			href("TARGET=\"expanded\"",
 			     ["#Binary?offset="++Offset++
@@ -351,14 +348,14 @@ href_proc_bin(From, T, Acc, LTB) ->
 		   true ->
 			PreviewStr
 		end;
-	    [Preview,SizeStr,Md5] when From =:= obs ->
+	    [PreviewIntStr,SizeStr,Md5] when From =:= obs ->
 		Size = list_to_integer(SizeStr),
-		PrevSize =  min(Size, 10) * 8,
-		PreviewStr = preview_string(Size,
-					    <<(list_to_integer(Preview)):PrevSize>>),
+                PreviewInt = list_to_integer(PreviewIntStr),
+		PrevSize = (trunc(math:log2(PreviewInt)/8)+1)*8,
+		PreviewStr = preview_string(Size,<<PreviewInt:PrevSize>>),
 		if LTB ->
 			href("TARGET=\"expanded\"",
-			     ["#OBSBinary?key1="++Preview++
+			     ["#OBSBinary?key1="++PreviewIntStr++
 				  "&key2="++SizeStr++
 				  "&key3="++Md5],
 			     PreviewStr);
@@ -372,14 +369,14 @@ href_proc_bin(From, T, Acc, LTB) ->
 
 preview_string(Size, PreviewBin) when Size > 10 ->
     ["&lt;&lt;",
-     remove_lgt(io_lib:format("~p",[PreviewBin])),
+     remove_lgt(io_lib:format("~tp",[PreviewBin])),
      "...(",
      observer_lib:to_str({bytes,Size}),
      ")",
      "&gt;&gt"];
 preview_string(_, PreviewBin) ->
     ["&lt;&lt;",
-     remove_lgt(io_lib:format("~p",[PreviewBin])),
+     remove_lgt(io_lib:format("~tp",[PreviewBin])),
      "&gt;&gt"].
 
 remove_lgt(Deep) ->
diff --git a/lib/observer/src/observer_lib.erl b/lib/observer/src/observer_lib.erl
index 8b6036f52a..463fb5b8ef 100644
--- a/lib/observer/src/observer_lib.erl
+++ b/lib/observer/src/observer_lib.erl
@@ -30,7 +30,8 @@
 	 create_attrs/0,
 	 set_listctrl_col_size/2,
 	 create_status_bar/1,
-	 html_window/1, html_window/2
+	 html_window/1, html_window/2,
+         make_obsbin/2
 	]).
 
 -include_lib("wx/include/wx.hrl").
@@ -300,7 +301,7 @@ to_str(Float) when is_float(Float) ->
 to_str({trunc, Float}) when is_float(Float) ->
     float_to_list(Float, [{decimals,0}]);
 to_str(Term) ->
-    io_lib:format("~w", [Term]).
+    io_lib:format("~tw", [Term]).
 
 create_menus([], _MenuBar, _Type) -> ok;
 create_menus(Menus, MenuBar, Type) ->
@@ -520,7 +521,7 @@ link_entry2(Panel,{Target,Str},Cursor) ->
     TC.
 
 to_link(RegName={Name, Node}) when is_atom(Name), is_atom(Node) ->
-    Str = io_lib:format("{~p,~p}", [Name, Node]),
+    Str = io_lib:format("{~tp,~p}", [Name, Node]),
     {RegName, Str};
 to_link(TI = {_Target, _Identifier}) ->
     TI;
@@ -641,11 +642,11 @@ parse_string(Str) ->
 	Tokens = case erl_scan:string(Str, 1, [text]) of
 		     {ok, Ts, _} -> Ts;
 		     {error, {_SLine, SMod, SError}, _} ->
-			 throw(io_lib:format("~s", [SMod:format_error(SError)]))
+			 throw(io_lib:format("~ts", [SMod:format_error(SError)]))
 		 end,
 	case lib:extended_parse_term(Tokens) of
 	    {error, {_PLine, PMod, PError}} ->
-		throw(io_lib:format("~s", [PMod:format_error(PError)]));
+		throw(io_lib:format("~ts", [PMod:format_error(PError)]));
 	    Res -> Res
 	end
     catch
@@ -769,3 +770,26 @@ update_progress_text(PD,Text) ->
     end.
 finish_progress(PD) ->
     wxProgressDialog:destroy(PD).
+
+make_obsbin(Bin,Tab) ->
+    Size = byte_size(Bin),
+    Preview =
+        try
+            %% The binary might be a unicode string, in which case we
+            %% don't want to split it in the middle of a grapheme
+            %% cluster - thus trying string:length and slice.
+            PL1 = min(string:length(Bin), 10),
+            PB1 = string:slice(Bin,0,PL1),
+            PS1 = byte_size(PB1) * 8,
+            <<P1:PS1>> = PB1,
+            P1
+        catch _:_ ->
+                %% Probably not a string, so just split anywhere
+                PS2 = min(Size, 10) * 8,
+                <<P2:PS2, _/binary>> = Bin,
+                P2
+        end,
+    Hash = erlang:phash2(Bin),
+    Key = {Preview, Size, Hash},
+    ets:insert(Tab, {Key,Bin}),
+    ['#OBSBin',Preview,Size,Hash].
diff --git a/lib/observer/src/observer_perf_wx.erl b/lib/observer/src/observer_perf_wx.erl
index fcc51310c8..5adfadb16e 100644
--- a/lib/observer/src/observer_perf_wx.erl
+++ b/lib/observer/src/observer_perf_wx.erl
@@ -87,7 +87,7 @@ init([Notebook, Parent, Config]) ->
 		       },
 	{Panel, State0}
     catch _:Err ->
-	    io:format("~p crashed ~p: ~p~n",[?MODULE, Err, erlang:get_stacktrace()]),
+	    io:format("~p crashed ~tp: ~tp~n",[?MODULE, Err, erlang:get_stacktrace()]),
 	    {stop, Err}
     end.
 
@@ -235,7 +235,7 @@ handle_info({'EXIT', Old, _}, State = #state{appmon=Old}) ->
     {noreply, State#state{active=false, appmon=undefined}};
 
 handle_info(_Event, State) ->
-    %% io:format("~p:~p: ~p~n",[?MODULE,?LINE,_Event]),
+    %% io:format("~p:~p: ~tp~n",[?MODULE,?LINE,_Event]),
     {noreply, State}.
 
 %%%%%%%%%%
diff --git a/lib/observer/src/observer_port_wx.erl b/lib/observer/src/observer_port_wx.erl
index 8339267659..5908e99e36 100644
--- a/lib/observer/src/observer_port_wx.erl
+++ b/lib/observer/src/observer_port_wx.erl
@@ -338,7 +338,7 @@ handle_info({info, {port_info_not_available,NodeName}},
     {noreply, State};
 
 handle_info({error, Error}, #state{panel=Panel} = State) ->
-    Str = io_lib:format("ERROR: ~s~n",[Error]),
+    Str = io_lib:format("ERROR: ~ts~n",[Error]),
     observer_lib:display_info_dialog(Panel, Str),
     {noreply, State};
 
diff --git a/lib/observer/src/observer_pro_wx.erl b/lib/observer/src/observer_pro_wx.erl
index 3083297f31..2e5fe0bc1a 100644
--- a/lib/observer/src/observer_pro_wx.erl
+++ b/lib/observer/src/observer_pro_wx.erl
@@ -217,7 +217,7 @@ call(Holder, What) ->
 	    erlang:demonitor(Ref),
 	    Res
     after 2000 ->
-	    io:format("Hanging call ~p~n",[What]),
+	    io:format("Hanging call ~tp~n",[What]),
 	    ""
     end.
 
@@ -256,7 +256,7 @@ handle_info(not_active, #state{timer=Timer0}=State) ->
     {noreply, State#state{timer=Timer}};
 
 handle_info(Info, State) ->
-    io:format("~p:~p, Unexpected info: ~p~n", [?MODULE, ?LINE, Info]),
+    io:format("~p:~p, Unexpected info: ~tp~n", [?MODULE, ?LINE, Info]),
     {noreply, State}.
 
 terminate(_Reason, #state{holder=Holder}) ->
@@ -273,11 +273,11 @@ handle_call(get_config, _, #state{holder=Holder, timer=Timer}=State) ->
     {reply, Conf#{acc=>Accum}, State};
 
 handle_call(Msg, _From, State) ->
-    io:format("~p:~p: Unhandled call ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p:~p: Unhandled call ~tp~n",[?MODULE, ?LINE, Msg]),
     {reply, ok, State}.
 
 handle_cast(Msg, State) ->
-    io:format("~p:~p: Unhandled cast ~p~n", [?MODULE, ?LINE, Msg]),
+    io:format("~p:~p: Unhandled cast ~tp~n", [?MODULE, ?LINE, Msg]),
     {noreply, State}.
 
 %%%%%%%%%%%%%%%%%%%%LOOP%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -401,7 +401,7 @@ handle_event(#wx{event=#wxList{type=command_list_item_activated}},
     {noreply, State#state{procinfo_menu_pids=Opened2}};
 
 handle_event(Event, State) ->
-    io:format("~p:~p: handle event ~p\n", [?MODULE, ?LINE, Event]),
+    io:format("~p:~p: handle event ~tp\n", [?MODULE, ?LINE, Event]),
     {noreply, State}.
 
 
@@ -559,7 +559,7 @@ table_holder(#holder{info=Info, attrs=Attrs,
             %% Node crashed will be noticed soon..
             table_holder(S0#holder{backend_pid=undefined});
 	_What ->
-            %% io:format("~p: Table holder got ~p~n",[?MODULE, _What]),
+            %% io:format("~p: Table holder got ~tp~n",[?MODULE, _What]),
 	    table_holder(S0)
     end.
 
diff --git a/lib/observer/src/observer_procinfo.erl b/lib/observer/src/observer_procinfo.erl
index 10decd8b62..963def958b 100644
--- a/lib/observer/src/observer_procinfo.erl
+++ b/lib/observer/src/observer_procinfo.erl
@@ -56,7 +56,7 @@ init([Pid, ParentFrame, Parent]) ->
 	Table = ets:new(observer_expand,[set,public]),
 	Title=case observer_wx:try_rpc(node(Pid), erlang, process_info, [Pid, registered_name]) of
 		  [] -> io_lib:format("~p",[Pid]);
-		  {registered_name, Registered} -> io_lib:format("~p (~p)",[Registered, Pid]);
+		  {registered_name, Registered} -> io_lib:format("~tp (~p)",[Registered, Pid]);
 		  undefined -> throw(process_undefined)
 	      end,
 	Frame=wxFrame:new(ParentFrame, ?wxID_ANY, [atom_to_list(node(Pid)), $:, Title],
@@ -171,7 +171,7 @@ handle_info({get_debug_info, From}, State = #state{notebook=Notebook}) ->
     From ! {procinfo_debug, Notebook},
     {noreply, State};
 handle_info(_Info, State) ->
-    %% io:format("~p: ~p, Handle info: ~p~n", [?MODULE, ?LINE, Info]),
+    %% io:format("~p: ~p, Handle info: ~tp~n", [?MODULE, ?LINE, Info]),
     {noreply, State}.
 
 handle_call(Call, From, _State) ->
@@ -263,7 +263,7 @@ init_stack_page(Parent, Pid) ->
 					      wxListCtrl:setItem(LCtrl, Row, 0, observer_lib:to_str({M,F,A})),
 					      FileLine = case Info of
 							     [{file,File},{line,Line}] ->
-								 io_lib:format("~s:~w", [File,Line]);
+								 io_lib:format("~ts:~w", [File,Line]);
 							     _ ->
 								 []
 							 end,
@@ -487,5 +487,5 @@ io_request({put_chars, Encoding, Module, Function, Args}, State) ->
 	    {error, {error, Function}, State}
     end;
 io_request(_Req, State) ->
-    %% io:format("~p: Unknown req: ~p ~n",[?LINE, _Req]),
+    %% io:format("~p: Unknown req: ~tp ~n",[?LINE, _Req]),
     {ok, {error, request}, State}.
diff --git a/lib/observer/src/observer_sys_wx.erl b/lib/observer/src/observer_sys_wx.erl
index 2e1af3ada9..8c2ffd77b4 100644
--- a/lib/observer/src/observer_sys_wx.erl
+++ b/lib/observer/src/observer_sys_wx.erl
@@ -199,7 +199,7 @@ handle_info(not_active, #sys_wx_state{timer = Timer} = State) ->
     {noreply, State#sys_wx_state{timer = observer_lib:stop_timer(Timer)}};
 
 handle_info(Info, State) ->
-    io:format("~p:~p: Unhandled info: ~p~n", [?MODULE, ?LINE, Info]),
+    io:format("~p:~p: Unhandled info: ~tp~n", [?MODULE, ?LINE, Info]),
     {noreply, State}.
 
 terminate(_Reason, _State) ->
@@ -212,11 +212,11 @@ handle_call(get_config, _, #sys_wx_state{timer=Timer}=State) ->
     {reply, observer_lib:timer_config(Timer), State};
 
 handle_call(Msg, _From, State) ->
-    io:format("~p~p: Unhandled Call ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p~p: Unhandled Call ~tp~n",[?MODULE, ?LINE, Msg]),
     {reply, ok, State}.
 
 handle_cast(Msg, State) ->
-    io:format("~p~p: Unhandled cast ~p~n",[?MODULE, ?LINE, Msg]),
+    io:format("~p~p: Unhandled cast ~tp~n",[?MODULE, ?LINE, Msg]),
     {noreply, State}.
 
 handle_event(#wx{id = ?ID_REFRESH, event = #wxCommand{type = command_menu_selected}},
@@ -235,5 +235,5 @@ handle_event(#wx{id = ?ID_REFRESH_INTERVAL,
     {noreply, State#sys_wx_state{timer=Timer}};
 
 handle_event(Event, State) ->
-    io:format("~p:~p: Unhandled event ~p\n", [?MODULE,?LINE,Event]),
+    io:format("~p:~p: Unhandled event ~tp\n", [?MODULE,?LINE,Event]),
     {noreply, State}.
diff --git a/lib/observer/src/observer_trace_wx.erl b/lib/observer/src/observer_trace_wx.erl
index b960c61ff0..8127248262 100644
--- a/lib/observer/src/observer_trace_wx.erl
+++ b/lib/observer/src/observer_trace_wx.erl
@@ -683,7 +683,7 @@ handle_event(#wx{id=?REMOVE_NODES}, #state{n_view=Nview, nodes=Ns0} = State) ->
     {noreply, State#state{nodes = Ns}};
 
 handle_event(#wx{id=ID, event = What}, State) ->
-    io:format("~p:~p: Unhandled event: ~p, ~p ~n", [?MODULE, ?LINE, ID, What]),
+    io:format("~p:~p: Unhandled event: ~p, ~tp ~n", [?MODULE, ?LINE, ID, What]),
     {noreply, State}.
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -729,7 +729,7 @@ handle_info({update_ms, NewMs}, State) ->
     {noreply, State#state{match_specs=NewMs}};
 
 handle_info(Any, State) ->
-    io:format("~p~p: received unexpected message: ~p\n", [?MODULE, self(), Any]),
+    io:format("~p~p: received unexpected message: ~tp\n", [?MODULE, self(), Any]),
     {noreply, State}.
 
 terminate(_Reason, #state{nodes=_Nodes}) ->
@@ -1046,33 +1046,33 @@ format_trace(Trace, Size, TS0={_,_,MS}) ->
 	    case element(4, Trace) of
 		{dbg,ok} -> "";
 		Message ->
-		    io_lib:format("~s (~100p) << ~100p~n", [TS,From,Message])
+		    io_lib:format("~s (~100p) << ~100tp~n", [TS,From,Message])
 	    end;
 	'send' ->
 	    Message = element(4, Trace),
 	    To = element(5, Trace),
-	    io_lib:format("~s (~100p) ~100p ! ~100p~n", [TS,From,To,Message]);
+	    io_lib:format("~s (~100p) ~100p ! ~100tp~n", [TS,From,To,Message]);
 	call ->
 	    case element(4, Trace) of
 		MFA when Size == 5 ->
 		    Message = element(5, Trace),
-		    io_lib:format("~s (~100p) call ~s (~100p) ~n", [TS,From,ffunc(MFA),Message]);
+		    io_lib:format("~s (~100p) call ~ts (~100tp) ~n", [TS,From,ffunc(MFA),Message]);
 		MFA ->
-		    io_lib:format("~s (~100p) call ~s~n", [TS,From,ffunc(MFA)])
+		    io_lib:format("~s (~100p) call ~ts~n", [TS,From,ffunc(MFA)])
 	    end;
 	return_from ->
 	    MFA = element(4, Trace),
 	    Ret = element(5, Trace),
-	    io_lib:format("~s (~100p) returned from ~s -> ~100p~n", [TS,From,ffunc(MFA),Ret]);
+	    io_lib:format("~s (~100p) returned from ~ts -> ~100tp~n", [TS,From,ffunc(MFA),Ret]);
 	return_to ->
 	    MFA = element(4, Trace),
-	    io_lib:format("~s (~100p) returning to ~s~n", [TS,From,ffunc(MFA)]);
+	    io_lib:format("~s (~100p) returning to ~ts~n", [TS,From,ffunc(MFA)]);
 	spawn when Size == 5 ->
 	    Pid = element(4, Trace),
 	    MFA = element(5, Trace),
-	    io_lib:format("~s (~100p) spawn ~100p as ~s~n", [TS,From,Pid,ffunc(MFA)]);
+	    io_lib:format("~s (~100p) spawn ~100p as ~ts~n", [TS,From,Pid,ffunc(MFA)]);
 	Op ->
-	    io_lib:format("~s (~100p) ~100p ~s~n", [TS,From,Op,ftup(Trace,4,Size)])
+	    io_lib:format("~s (~100p) ~100p ~ts~n", [TS,From,Op,ftup(Trace,4,Size)])
     end.
 
 %%% These f* functions returns non-flat strings
@@ -1080,24 +1080,24 @@ format_trace(Trace, Size, TS0={_,_,MS}) ->
 %% {M,F,[A1, A2, ..., AN]} -> "M:F(A1, A2, ..., AN)"
 %% {M,F,A}                 -> "M:F/A"
 ffunc({M,F,Argl}) when is_list(Argl) ->
-    io_lib:format("~100p:~100p(~s)", [M, F, fargs(Argl)]);
+    io_lib:format("~100p:~100tp(~ts)", [M, F, fargs(Argl)]);
 ffunc({M,F,Arity}) ->
-    io_lib:format("~100p:~100p/~100p", [M,F,Arity]);
-ffunc(X) -> io_lib:format("~100p", [X]).
+    io_lib:format("~100p:~100tp/~100p", [M,F,Arity]);
+ffunc(X) -> io_lib:format("~100tp", [X]).
 
 %% Integer           -> "Integer"
 %% [A1, A2, ..., AN] -> "A1, A2, ..., AN"
 fargs(Arity) when is_integer(Arity) -> integer_to_list(Arity);
 fargs([]) -> [];
-fargs([A]) -> io_lib:format("~100p", [A]);  %% last arg
-fargs([A|Args]) -> [io_lib:format("~100p,", [A]) | fargs(Args)];
-fargs(A) -> io_lib:format("~100p", [A]). % last or only arg
+fargs([A]) -> io_lib:format("~100tp", [A]);  %% last arg
+fargs([A|Args]) -> [io_lib:format("~100tp,", [A]) | fargs(Args)];
+fargs(A) -> io_lib:format("~100tp", [A]). % last or only arg
 
 %% {A_1, A_2, ..., A_N} -> "A_Index A_Index+1 ... A_Size"
 ftup(Trace, Index, Index) ->
-    io_lib:format("~100p", [element(Index, Trace)]);
+    io_lib:format("~100tp", [element(Index, Trace)]);
 ftup(Trace, Index, Size) ->
-    [io_lib:format("~100p ", [element(Index, Trace)])
+    [io_lib:format("~100tp ", [element(Index, Trace)])
      | ftup(Trace, Index+1, Size)].
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -1125,18 +1125,19 @@ get_config(#state{def_proc_flags = ProcFlags,
 
 write_file(Frame, Filename, Config) ->
     Str =
-	["%%%\n%%% This file is generated by Observer\n",
+	["%%% ",epp:encoding_to_string(utf8), "\n"
+         "%%%\n%%% This file is generated by Observer\n",
 	 "%%%\n%%% DO NOT EDIT!\n%%%\n",
-	 [io_lib:format("~p.~n",[MSTerm]) ||
+	 [io_lib:format("~tp.~n",[MSTerm]) ||
              MSTerm <- proplists:get_value(match_specs, Config)],
 	 io_lib:format("~p.~n",[lists:keyfind(procflags, 1, Config)]),
 	 io_lib:format("~p.~n",[lists:keyfind(portflags, 1, Config)]),
-	 io_lib:format("~p.~n",[lists:keyfind(output, 1, Config)]),
-	 [io_lib:format("~p.~n",[ModuleTerm]) ||
+	 io_lib:format("~tp.~n",[lists:keyfind(output, 1, Config)]),
+	 [io_lib:format("~tp.~n",[ModuleTerm]) ||
              ModuleTerm <- proplists:get_value(trace_p, Config)]
 	],
 
-    case file:write_file(Filename, list_to_binary(Str)) of
+    case file:write_file(Filename, unicode:characters_to_binary(Str)) of
 	ok ->
 	    success;
 	{error, Reason} ->
@@ -1200,7 +1201,7 @@ make_ms(MS) ->
     make_ms(Name,Term,FunStr).
 
 make_ms(Name, Term, FunStr) ->
-    #match_spec{name=Name, term=Term, str=io_lib:format("~w", Term), func = FunStr}.
+    #match_spec{name=Name, term=Term, str=io_lib:format("~tw", Term), func = FunStr}.
 
 parse_tp({tp, Mod, FAs}, State) ->
     Patterns = [#tpattern{m=Mod,fa={F,A}, ms=make_ms(List)} ||
diff --git a/lib/observer/src/observer_traceoptions_wx.erl b/lib/observer/src/observer_traceoptions_wx.erl
index 285c298c4b..4f46426cf6 100644
--- a/lib/observer/src/observer_traceoptions_wx.erl
+++ b/lib/observer/src/observer_traceoptions_wx.erl
@@ -487,7 +487,7 @@ edit_ms(TextCtrl, Label0, Parent) ->
 		    _ -> Label0
 		end,
 	#match_spec{name=Label, term=MatchSpec,
-		    str=io_lib:format("~w",[MatchSpec]),
+		    str=io_lib:format("~tw",[MatchSpec]),
 		    func=Str}
     catch
 	throw:cancel ->
@@ -511,18 +511,18 @@ ms_from_string(Str) ->
 	Tokens = case erl_scan:string(Str) of
 		     {ok, Ts, _} -> Ts;
 		     {error, {SLine, SMod, SError}, _} ->
-			 throw(io_lib:format("~w: ~s", [SLine,SMod:format_error(SError)]))
+			 throw(io_lib:format("~w: ~ts", [SLine,SMod:format_error(SError)]))
 		 end,
 	Exprs  = case erl_parse:parse_exprs(Tokens) of
 		     {ok, T} -> T;
 		     {error, {PLine, PMod, PError}} ->
-			 throw(io_lib:format("~w: ~s", [PLine,PMod:format_error(PError)]))
+			 throw(io_lib:format("~w: ~ts", [PLine,PMod:format_error(PError)]))
 		 end,
 	Term = case Exprs of
 		   [{'fun', _, {clauses, Clauses}}|_] ->
 		       case ms_transform:transform_from_shell(dbg,Clauses,orddict:new()) of
 			   {error, [{_,[{MSLine,Mod,MSInfo}]}],_} ->
-			       throw(io_lib:format("~w: ~p", [MSLine,Mod:format_error(MSInfo)]));
+			       throw(io_lib:format("~w: ~tp", [MSLine,Mod:format_error(MSInfo)]));
 			   {error, _} ->
 			       throw("Could not convert fun() to match spec");
 			   Ms ->
@@ -536,7 +536,7 @@ ms_from_string(Str) ->
 	    {error, List} -> throw([[Error, $\n] || {_, Error} <- List])
 	end
     catch error:_Reason ->
-	    %% io:format("Bad term: ~s~n ~p in ~p~n", [Str, _Reason, erlang:get_stacktrace()]),
+	    %% io:format("Bad term: ~ts~n ~tp in ~tp~n", [Str, _Reason, erlang:get_stacktrace()]),
 	    throw("Invalid term")
     end.
 
@@ -556,7 +556,8 @@ filter_listbox_data(Input, Data, ListBox) ->
     filter_listbox_data(Input, Data, ListBox, true).
 
 filter_listbox_data(Input, Data, ListBox, AddClientData) ->
-    FilteredData = [X || X = {Str, _} <- Data, re:run(Str, Input) =/= nomatch],
+    FilteredData = [X || X = {Str, _} <- Data,
+                         re:run(Str, Input, [unicode]) =/= nomatch],
     wxListBox:clear(ListBox),
     wxListBox:appendStrings(ListBox, [Str || {Str,_} <- FilteredData]),
     AddClientData andalso
@@ -648,9 +649,9 @@ parse_function_names(Choices) ->
 parse_function_names([], Acc) ->
     lists:reverse(Acc);
 parse_function_names([{H, Term}|T], Acc) ->
-    IsFun = re:run(H, ".*-fun-\\d*?-"),
-    IsLc = re:run(H, ".*-lc\\$\\^\\d*?/\\d*?-\\d*?-"),
-    IsLbc = re:run(H, ".*-lbc\\$\\^\\d*?/\\d*?-\\d*?-"),
+    IsFun = re:run(H, ".*-fun-\\d*?-", [unicode,ucp]),
+    IsLc = re:run(H, ".*-lc\\$\\^\\d*?/\\d*?-\\d*?-", [unicode,ucp]),
+    IsLbc = re:run(H, ".*-lbc\\$\\^\\d*?/\\d*?-\\d*?-", [unicode,ucp]),
     Parsed =
 	if IsFun =/= nomatch -> "Fun: " ++ H;
 	   IsLc =/= nomatch -> "List comprehension: " ++ H;
diff --git a/lib/observer/src/observer_tv_table.erl b/lib/observer/src/observer_tv_table.erl
index 789e060cfb..d6dcee2cda 100644
--- a/lib/observer/src/observer_tv_table.erl
+++ b/lib/observer/src/observer_tv_table.erl
@@ -258,7 +258,7 @@ handle_event(#wx{event=#wxList{type=command_list_item_selected, itemIndex=Index}
 	     State = #state{pid=Pid, grid=Grid, status=StatusBar}) ->
     N = wxListCtrl:getItemCount(Grid),
     Str = get_row(Pid, Index, all),
-    wxStatusBar:setStatusText(StatusBar, io_lib:format("Objects: ~w: ~s",[N, Str])),
+    wxStatusBar:setStatusText(StatusBar, io_lib:format("Objects: ~w: ~ts",[N, Str])),
     {noreply, State#state{selected=Index}};
 
 handle_event(#wx{event=#wxList{type=command_list_item_activated, itemIndex=Index}},
@@ -278,7 +278,7 @@ handle_event(#wx{id=?ID_DELETE},
 	     State = #state{grid=Grid, pid=Pid, status=StatusBar, selected=Index}) ->
     Str = get_row(Pid, Index, all),
     Pid ! {delete, Index},
-    wxStatusBar:setStatusText(StatusBar, io_lib:format("Deleted object: ~s",[Str])),
+    wxStatusBar:setStatusText(StatusBar, io_lib:format("Deleted object: ~ts",[Str])),
     wxListCtrl:setItemState(Grid, Index, 0, ?wxLIST_STATE_FOCUSED),
     {noreply, State#state{selected=undefined}};
 
@@ -338,7 +338,7 @@ handle_event(#wx{id=?SEARCH_ENTRY, event=#wxCommand{type=command_text_enter,cmdS
     Pid ! {mark_search_hit, false},
     case search(Pid, Str, Pos, Dir, Case) of
 	false ->
-	    wxStatusBar:setStatusText(SB, io_lib:format("Not found (regexp): ~s",[Str])),
+	    wxStatusBar:setStatusText(SB, io_lib:format("Not found (regexp): ~ts",[Str])),
 	    Pid ! {mark_search_hit, Find#find.start},
 	    wxListCtrl:refreshItem(Grid, Find#find.start),
 	    {noreply, State#state{search=Search#search{find=Find#find{found=false}}}};
@@ -372,7 +372,7 @@ handle_event(#wx{id=?SEARCH_ENTRY, event=#wxCommand{cmdString=Str}},
 	Pid ! {mark_search_hit, false},
 	case search(Pid, Str, Cont#find.start, Dir, Case) of
 	    false ->
-		wxStatusBar:setStatusText(SB, io_lib:format("Not found (regexp): ~s",[Str])),
+		wxStatusBar:setStatusText(SB, io_lib:format("Not found (regexp): ~ts",[Str])),
 		{noreply, State};
 	    Row ->
 		wxListCtrl:ensureVisible(Grid, Row),
@@ -395,19 +395,19 @@ handle_event(#wx{id=?ID_REFRESH_INTERVAL},
     {noreply, State#state{timer=Timer}};
 
 handle_event(_Event, State) ->
-    %io:format("~p:~p, handle event ~p\n", [?MODULE, ?LINE, Event]),
+    %io:format("~p:~p, handle event ~tp\n", [?MODULE, ?LINE, Event]),
     {noreply, State}.
 
 handle_sync_event(_Event, _Obj, _State) ->
-    %io:format("~p:~p, handle sync_event ~p\n", [?MODULE, ?LINE, Event]),
+    %io:format("~p:~p, handle sync_event ~tp\n", [?MODULE, ?LINE, Event]),
     ok.
 
 handle_call(_Event, _From, State) ->
-    %io:format("~p:~p, handle call (~p) ~p\n", [?MODULE, ?LINE, From, Event]),
+    %io:format("~p:~p, handle call (~p) ~tp\n", [?MODULE, ?LINE, From, Event]),
     {noreply, State}.
 
 handle_cast(_Event, State) ->
-    %io:format("~p:~p, handle cast ~p\n", [?MODULE, ?LINE, Event]),
+    %io:format("~p:~p, handle cast ~tp\n", [?MODULE, ?LINE, Event]),
     {noreply, State}.
 
 handle_info({no_rows, N}, State = #state{grid=Grid, status=StatusBar}) ->
@@ -433,7 +433,7 @@ handle_info(refresh_interval, State = #state{pid=Pid}) ->
 handle_info({error, Error}, State = #state{frame=Frame}) ->
     ErrorStr =
 	try io_lib:format("~ts", [Error]), Error
-	catch _:_ -> io_lib:format("~p", [Error])
+	catch _:_ -> io_lib:format("~tp", [Error])
 	end,
     Dlg = wxMessageDialog:new(Frame, ErrorStr),
     wxMessageDialog:showModal(Dlg),
@@ -441,7 +441,7 @@ handle_info({error, Error}, State = #state{frame=Frame}) ->
     {noreply, State};
 
 handle_info(_Event, State) ->
-    %% io:format("~p:~p, handle info ~p\n", [?MODULE, ?LINE, _Event]),
+    %% io:format("~p:~p, handle info ~tp\n", [?MODULE, ?LINE, _Event]),
     {noreply, State}.
 
 terminate(_Event, #state{pid=Pid, attrs=Attrs}) ->
@@ -554,7 +554,7 @@ table_holder(S0 = #holder{parent=Parent, pid=Pid, table=Table}) ->
 	    edit_row(Row, Term, S0),
 	    table_holder(S0);
 	What ->
-	    io:format("Table holder got ~p~n",[What]),
+	    io:format("Table holder got ~tp~n",[What]),
 	    Parent ! {refresh, 0, S0#holder.n-1},
 	    table_holder(S0)
     end.
@@ -641,7 +641,7 @@ search([Str, Row, Dir0, CaseSens],
 	      true -> 1;
 	      false -> -1
 	  end,
-    Res = case re:compile(Str, Opt) of
+    Res = case re:compile(Str, [unicode|Opt]) of
 	      {ok, Re} -> re_search(Row, Dir, N, Re, Table);
 	      {error, _} -> false
 	  end,
@@ -665,7 +665,7 @@ get_row(From, Row, Col, Table) ->
 	[Object|_] when Col =:= all ->
 	    From ! {self(), format(Object)};
 	[Object|_] when Col =:= all_multiline ->
-	    From ! {self(), io_lib:format("~p", [Object])};
+	    From ! {self(), io_lib:format("~tp", [Object])};
         [Object|_] when Col =:= term ->
 	    From ! {self(), Object};
 	[Object|_] when tuple_size(Object) >= Col ->
@@ -801,7 +801,7 @@ format(Bin) when is_binary(Bin), byte_size(Bin) > 100 ->
     io_lib:format("<<#Bin:~w>>", [byte_size(Bin)]);
 format(Bin) when is_binary(Bin) ->
     try
-	true = printable_list(unicode:characters_to_list(Bin)),
+	true = io_lib:printable_list(unicode:characters_to_list(Bin)),
 	io_lib:format("<<\"~ts\">>", [Bin])
     catch _:_ ->
 	    io_lib:format("~w", [Bin])
@@ -809,7 +809,7 @@ format(Bin) when is_binary(Bin) ->
 format(Float) when is_float(Float) ->
     io_lib:format("~.3g", [Float]);
 format(Term) ->
-    io_lib:format("~w", [Term]).
+    io_lib:format("~tw", [Term]).
 
 format_tuple(Tuple, I, Max) when I < Max ->
     [format(element(I, Tuple)), $,|format_tuple(Tuple, I+1, Max)];
@@ -820,7 +820,7 @@ format_tuple(_Tuple, 1, 0) ->
 
 format_list([]) -> "[]";
 format_list(List) ->
-    case printable_list(List) of
+    case io_lib:printable_list(List) of
 	true ->  io_lib:format("\"~ts\"", [map_printable_list(List)]);
 	false -> [$[ | make_list(List)]
     end.
@@ -849,26 +849,3 @@ map_printable_list([$\e|Cs]) ->
 map_printable_list([]) -> [];
 map_printable_list([C|Cs]) ->
     [C|map_printable_list(Cs)].
-
-%% printable_list([Char]) -> bool()
-%%  Return true if CharList is a list of printable characters, else
-%%  false.
-
-printable_list([C|Cs]) when is_integer(C), C >= $ , C =< 255 ->
-    printable_list(Cs);
-printable_list([$\n|Cs]) ->
-    printable_list(Cs);
-printable_list([$\r|Cs]) ->
-    printable_list(Cs);
-printable_list([$\t|Cs]) ->
-    printable_list(Cs);
-printable_list([$\v|Cs]) ->
-    printable_list(Cs);
-printable_list([$\b|Cs]) ->
-    printable_list(Cs);
-printable_list([$\f|Cs]) ->
-    printable_list(Cs);
-printable_list([$\e|Cs]) ->
-    printable_list(Cs);
-printable_list([]) -> true;
-printable_list(_Other) -> false.	     %Everything else is false
diff --git a/lib/observer/src/observer_tv_wx.erl b/lib/observer/src/observer_tv_wx.erl
index 9564bdfa1c..e16f3cab6b 100644
--- a/lib/observer/src/observer_tv_wx.erl
+++ b/lib/observer/src/observer_tv_wx.erl
@@ -252,7 +252,7 @@ handle_info(not_active, State = #state{timer = Timer0}) ->
     {noreply, State#state{timer=Timer}};
 
 handle_info({error, Error}, #state{panel=Panel,opt=Opt}=State) ->
-    Str = io_lib:format("ERROR: ~s~n",[Error]),
+    Str = io_lib:format("ERROR: ~ts~n",[Error]),
     observer_lib:display_info_dialog(Panel,Str),
     case Opt#opt.type of
         mnesia -> wxMenuBar:check(observer_wx:get_menubar(), ?ID_ETS, true);
diff --git a/lib/observer/src/observer_wx.erl b/lib/observer/src/observer_wx.erl
index 9b9e80f479..be93b1d5f1 100644
--- a/lib/observer/src/observer_wx.erl
+++ b/lib/observer/src/observer_wx.erl
@@ -459,7 +459,7 @@ handle_info({'EXIT', Pid, Reason}, State) ->
 	normal ->
 	    {noreply, State};
 	_ ->
-	    io:format("Observer: Child (~s) crashed exiting:  ~p ~p~n",
+	    io:format("Observer: Child (~s) crashed exiting:  ~p ~tp~n",
 		      [pid2panel(Pid, State), Pid, Reason]),
 	    {stop, normal, State}
     end;
@@ -504,7 +504,7 @@ save_config(Panels) ->
     File = config_file(),
     case filelib:ensure_dir(File) of
         ok ->
-            Format = [io_lib:format("~p.~n",[Conf]) || Conf <- Configs],
+            Format = [io_lib:format("~tp.~n",[Conf]) || Conf <- Configs],
             _ = file:write_file(File, Format);
         _ ->
             ignore
diff --git a/lib/observer/src/ttb.erl b/lib/observer/src/ttb.erl
index 09b0bc6710..940fdc9818 100644
--- a/lib/observer/src/ttb.erl
+++ b/lib/observer/src/ttb.erl
@@ -635,7 +635,7 @@ stop(Opts) when is_list(Opts) ->
             ok;
         {_, {stopped, _}} ->
             %% Printout moved out of the ttb loop to avoid occasional deadlock
-            io:format("Stored logs in ~s~n", [element(2, Result)]);
+            io:format("Stored logs in ~ts~n", [element(2, Result)]);
         {_, _} ->
             ok
     end,
@@ -792,7 +792,7 @@ do_stop({FetchOrFormat, UserDir}, Sender, NodeInfo, SessionInfo) ->
     write_config(?last_config, all),
     Localhost = host(node()),
     Dir = get_fetch_dir(UserDir, proplists:get_value(logfile, SessionInfo)),
-    file:make_dir(Dir),
+    ok = filelib:ensure_dir(filename:join(Dir,"*")),
     %% The nodes are traversed twice here because
     %% the meta tracing in observer_backend must be
     %% stopped before dbg is stopped, and dbg must
@@ -900,21 +900,29 @@ fetch_report(Localhost, Dir, Node, MetaFile) ->
 
 fetch(Localhost,Dir,Node,MetaFile) ->
     case (host(Node) == Localhost) orelse is_local(MetaFile) of
-    true -> % same host, just move the files
+        true -> % same host, just move the files
 	    Files = get_filenames(Node,MetaFile),
 	    lists:foreach(
-            fun(File0) ->
-                Dest = filename:join(Dir,filename:basename(File0)),
-                file:rename(File0, Dest)
-            end,
-        Files);
+              fun(File0) ->
+                      Dest = filename:join(Dir,filename:basename(File0)),
+                      file:rename(File0, Dest)
+              end,
+              Files);
 	false ->
 	    {ok, LSock} = gen_tcp:listen(0, [binary,{packet,2},{active,false}]),
 	    {ok,Port} = inet:port(LSock),
-	    rpc:cast(Node,observer_backend,ttb_fetch,
-		     [MetaFile,{Port,Localhost}]),
+            Enc = file:native_name_encoding(),
+            Args =
+                case rpc:call(Node,erlang,function_exported,
+                              [observer_backend,ttb_fetch,3]) of
+                    true ->
+                        [MetaFile,{Port,Localhost},Enc];
+                    false ->
+                        [MetaFile,{Port,Localhost}]
+                end,
+            rpc:cast(Node,observer_backend,ttb_fetch,Args),
 	    {ok, Sock} = gen_tcp:accept(LSock),
-	    receive_files(Dir,Sock,undefined),
+	    receive_files(Dir,Sock,undefined,Enc),
 	    ok = gen_tcp:close(LSock),
 	    ok = gen_tcp:close(Sock)
     end.
@@ -929,25 +937,48 @@ get_filenames(_N, {local,F,_}) ->
 get_filenames(N, F) ->
     rpc:call(N, observer_backend,ttb_get_filenames,[F]).
 
-receive_files(Dir,Sock,Fd) ->
+receive_files(Dir,Sock,Fd,Enc) ->
     case gen_tcp:recv(Sock, 0) of
 	{ok, <<0,Bin/binary>>} ->
 	    file:write(Fd,Bin),
-	    receive_files(Dir,Sock,Fd);
-	{ok, <<1,Bin/binary>>} ->
-	    File0 = binary_to_list(Bin),
+	    receive_files(Dir,Sock,Fd,Enc);
+	{ok, <<Code,Bin/binary>>} when Code==1; Code==2; Code==3 ->
+            File0 = decode_filename(Code,Bin,Enc),
 	    File = filename:join(Dir,File0),
 	    {ok,Fd1} = file:open(File,[raw,write]),
-	    receive_files(Dir,Sock,Fd1);
+	    receive_files(Dir,Sock,Fd1,Enc);
 	{error, closed} ->
 	    ok = file:close(Fd)
     end.    
 
+decode_filename(1,Bin,_Enc) ->
+    %% Old version of observer_backend - filename encoded with
+    %% list_to_binary
+    binary_to_list(Bin);
+decode_filename(2,Bin,Enc) ->
+    %% Successfully encoded filename with correct encoding
+    unicode:characters_to_list(Bin,Enc);
+decode_filename(3,Bin,latin1) ->
+    %% Filename encoded with faulty encoding. This has to be utf8
+    %% remote and latin1 here, and the filename actually containing
+    %% characters outside the latin1 range. So making an escaped
+    %% variant of the filename and warning about it.
+    File0 = unicode:characters_to_list(Bin,utf8),
+    File = [ case X of
+                     High when High > 255 ->
+                         ["\\\\x{",erlang:integer_to_list(X, 16),$}];
+                     Low ->
+                         Low
+                 end || X <- File0 ],
+    io:format("Warning: fetching file with faulty filename encoding ~ts~n"
+              "Will be written as ~ts~n",
+              [File0,File]),
+    File.
+
 host(Node) ->
     [_name,Host] = string:tokens(atom_to_list(Node),"@"),
     Host.
 
-
 wait_for_fetch([]) ->
     ok;
 wait_for_fetch(Nodes) ->
@@ -1087,7 +1118,7 @@ read_traci(File) ->
 	{ok,B} -> 
 	    interpret_binary(B,dict:new(),[]);
 	_ -> 
-	    io:format("Warning: no meta data file: ~s~n",[MetaFile]),
+	    io:format("Warning: no meta data file: ~ts~n",[MetaFile]),
 	    {dict:new(),[]}
     end.
 
@@ -1303,7 +1334,7 @@ get_term(B) ->
     end.
 
 display_warning(Item,Warning) ->
-    io:format("Warning: {~w,~w}~n",[Warning,Item]).
+    io:format("Warning: {~tw,~tw}~n",[Warning,Item]).
 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
diff --git a/lib/observer/src/ttb_et.erl b/lib/observer/src/ttb_et.erl
index 95e8e9aa07..1b828eebc0 100644
--- a/lib/observer/src/ttb_et.erl
+++ b/lib/observer/src/ttb_et.erl
@@ -137,13 +137,13 @@ processes(E0) ->
     E = label(E0),
     {{FromProc,FromNode},{ToProc,ToNode}} = 
 	get_actors(E#event.from,E#event.to),
-    {true,E#event{from = io_lib:format("~w~n~w",[FromProc,FromNode]),
-		  to = io_lib:format("~w~n~w",[ToProc,ToNode])}}.
+    {true,E#event{from = io_lib:format("~tw~n~w",[FromProc,FromNode]),
+		  to = io_lib:format("~tw~n~w",[ToProc,ToNode])}}.
 
 
 mods_and_procs(E) ->
     ActorFun = fun({M,_F,_A},{Proc,Node}) -> 
-		       io_lib:format("~w~n~w~n~w",[M,Proc,Node])
+		       io_lib:format("~w~n~tw~n~w",[M,Proc,Node])
 	       end,
     calltrace_filter(E,ActorFun).
 
@@ -155,13 +155,13 @@ modules(E) ->
 
 funcs_and_procs(E) ->
     ActorFun = fun({M,F,A},{Proc,Node}) -> 
-		       io_lib:format("~s~n~w~n~w",[mfa(M,F,A),Proc,Node])
+		       io_lib:format("~ts~n~tw~n~w",[mfa(M,F,A),Proc,Node])
 	       end,
     calltrace_filter(E,ActorFun).
     
 functions(E) ->
     ActorFun = fun({M,F,A},{_Proc,Node}) -> 
-		       io_lib:format("~s~n~w",[mfa(M,F,A),Node])
+		       io_lib:format("~ts~n~w",[mfa(M,F,A),Node])
 	       end,
     calltrace_filter(E,ActorFun).
     
@@ -221,7 +221,7 @@ label(Event=#event{label=L,contents=C}) ->
 	false -> Event
     end.
 label(L,{M,F,A}) -> label(L,M,F,A);
-label(L,Other) -> io_lib:format("~w ~w",[L,Other]).
+label(L,Other) -> io_lib:format("~w ~tw",[L,Other]).
 label(call,M,F,A) -> "call " ++ mfa(M,F,A);
 label(return_from,M,F,A) -> "return_from " ++ mfa(M,F,A);
 label(return_to,M,F,A) -> "return_to " ++ mfa(M,F,A);
diff --git a/lib/observer/test/Makefile b/lib/observer/test/Makefile
index 6100af5e17..fcb1b73911 100644
--- a/lib/observer/test/Makefile
+++ b/lib/observer/test/Makefile
@@ -27,7 +27,8 @@ MODULES =  \
 	ttb_SUITE \
 	client \
 	server \
-	crashdump_helper
+	crashdump_helper \
+	crashdump_helper_unicode
 
 ERL_FILES= $(MODULES:%=%.erl)
 
@@ -46,7 +47,7 @@ RELSYSDIR = $(RELEASE_PATH)/observer_test
 # FLAGS
 # ----------------------------------------------------
 ERL_MAKE_FLAGS +=
-ERL_COMPILE_FLAGS +=
+ERL_COMPILE_FLAGS += +nowarn_export_all
 
 EBIN = .
 
diff --git a/lib/observer/test/crashdump_helper_unicode.erl b/lib/observer/test/crashdump_helper_unicode.erl
new file mode 100644
index 0000000000..60c3d20315
--- /dev/null
+++ b/lib/observer/test/crashdump_helper_unicode.erl
@@ -0,0 +1,22 @@
+-module(crashdump_helper_unicode).
+-behaviour(gen_server).
+-export([start/0, init/1, handle_call/3, handle_cast/2]).
+-record(state, {s,a,b,lb}).
+
+start() ->
+    gen_server:start({local, 'unicode_reg_name_αβ'}, ?MODULE, [], []).
+
+init([]) ->
+    process_flag(trap_exit, true),
+    ets:new('tab_αβ',[set,named_table]),
+    Bin = <<"bin αβ"/utf8>>,
+    LongBin = <<"long bin αβ - a utf8 binary which can be expanded αβ"/utf8>>,
+    {ok, #state{s = "unicode_string_αβ",
+                a = 'unicode_atom_αβ',
+                b = Bin,
+                lb = LongBin}}.
+
+handle_call(_Info, _From, State) ->
+    {reply, ok, State}.
+handle_cast(_Info, State) ->
+    {noreply, State}.
diff --git a/lib/observer/test/crashdump_viewer_SUITE.erl b/lib/observer/test/crashdump_viewer_SUITE.erl
index 1fd94ffb3c..77cf086d4b 100644
--- a/lib/observer/test/crashdump_viewer_SUITE.erl
+++ b/lib/observer/test/crashdump_viewer_SUITE.erl
@@ -427,6 +427,18 @@ special(File,Procs) ->
             {ok,_,[TW]} = crashdump_viewer:general_info(),
             {match,_} = re:run(TW,"CRASH DUMP SIZE LIMIT REACHED"),
             ok;
+        ".unicode" ->
+            #proc{pid=Pid0} =
+                lists:keyfind("'unicode_reg_name_αβ'",#proc.name,Procs),
+            Pid = pid_to_list(Pid0),
+	    {ok,#proc{},[]} = crashdump_viewer:proc_details(Pid),
+            io:format("  unicode registered name ok",[]),
+
+	    {ok,[#ets_table{id="'tab_αβ'",name="'tab_αβ'"}],[]} =
+                crashdump_viewer:ets_tables(Pid),
+            io:format("  unicode table name ok",[]),
+
+            ok;
 	_ ->
 	    ok
     end,
@@ -492,7 +504,8 @@ do_create_dumps(DataDir,Rel) ->
             CD5 = dump_with_args(DataDir,Rel,"trunc.bytes",
                                  "-env ERL_CRASH_DUMP_BYTES " ++
                                      integer_to_list(Bytes)),
-	    {[CD1,CD2,CD3,CD4,CD5], DosDump};
+            CD6 = dump_with_unicode_atoms(DataDir,Rel,"unicode"),
+	    {[CD1,CD2,CD3,CD4,CD5,CD6], DosDump};
 	_ ->
 	    {[CD1,CD2], DosDump}
     end.
@@ -573,6 +586,16 @@ dump_with_strange_module_name(DataDir,Rel,DumpName) ->
     ?t:stop_node(n1),
     CD.
 
+dump_with_unicode_atoms(DataDir,Rel,DumpName) ->
+    Opt = rel_opt(Rel),
+    Pz = "-pz \"" ++ filename:dirname(code:which(?MODULE)) ++ "\"",
+    PzOpt = [{args,Pz}],
+    {ok,N1} = ?t:start_node(n1,peer,Opt ++ PzOpt),
+    {ok,_Pid} = rpc:call(N1,crashdump_helper_unicode,start,[]),
+    CD = dump(N1,DataDir,Rel,DumpName),
+    ?t:stop_node(n1),
+    CD.
+
 dump(Node,DataDir,Rel,DumpName) ->
     Crashdump = filename:join(DataDir, dump_prefix(Rel)++DumpName),
     rpc:call(Node,os,putenv,["ERL_CRASH_DUMP",Crashdump]),
diff --git a/lib/runtime_tools/src/observer_backend.erl b/lib/runtime_tools/src/observer_backend.erl
index 7f0c1ac6e4..1b075a507d 100644
--- a/lib/runtime_tools/src/observer_backend.erl
+++ b/lib/runtime_tools/src/observer_backend.erl
@@ -36,6 +36,7 @@
 	 ttb_write_binary/2,
 	 ttb_stop/1,
 	 ttb_fetch/2,
+	 ttb_fetch/3,
          ttb_resume_trace/0,
 	 ttb_get_filenames/1]).
 -define(CHUNKSIZE,8191). % 8 kbytes - 1 byte
@@ -658,22 +659,42 @@ stop_seq_trace() ->
 
 %% Fetch ttb logs from remote node
 ttb_fetch(MetaFile,{Port,Host}) ->
+    ttb_fetch(MetaFile,{Port,Host},undefined).
+ttb_fetch(MetaFile,{Port,Host},MasterEnc) ->
     erlang:process_flag(priority,low),
     Files = ttb_get_filenames(MetaFile),
     {ok, Sock} = gen_tcp:connect(Host, Port, [binary, {packet, 2}]),
-    send_files({Sock,Host},Files),
+    send_files({Sock,Host},Files,MasterEnc,file:native_name_encoding()),
     ok = gen_tcp:close(Sock).
 
 
-send_files({Sock,Host},[File|Files]) ->
+send_files({Sock,Host},[File|Files],MasterEnc,MyEnc) ->
     {ok,Fd} = file:open(File,[raw,read,binary]),
-    ok = gen_tcp:send(Sock,<<1,(list_to_binary(filename:basename(File)))/binary>>),
+    Basename = filename:basename(File),
+    {Code,FilenameBin} = encode_filename(Basename,MasterEnc,MyEnc),
+    ok = gen_tcp:send(Sock,<<Code,FilenameBin/binary>>),
     send_chunks(Sock,Fd),
     ok = file:delete(File),
-    send_files({Sock,Host},Files);
-send_files({_Sock,_Host},[]) ->
+    send_files({Sock,Host},Files,MasterEnc,MyEnc);
+send_files({_Sock,_Host},[],_MasterEnc,_MyEnc) ->
     done.
 
+encode_filename(Basename,undefined,MyEnc) ->
+    %% Compatible with old version of ttb.erl, but no longer crashing
+    %% for code points > 255.
+    {1,unicode:characters_to_binary(Basename,MyEnc,MyEnc)};
+encode_filename(Basename,MasterEnc,MyEnc) ->
+    case unicode:characters_to_binary(Basename,MyEnc,MasterEnc) of
+        Bin when is_binary(Bin) ->
+            %% Encoding succeeded
+            {2,Bin};
+        _ ->
+            %% Can't convert Basename from my encoding to the master
+            %% node's encoding. Doing my best and hoping that master
+            %% node can fix it...
+            {3,unicode:characters_to_binary(Basename,MyEnc,MyEnc)}
+    end.
+
 send_chunks(Sock,Fd) ->
     case file:read(Fd,?CHUNKSIZE) of
 	{ok,Bin} ->