1 files changed, 16 insertions, 5 deletions

diff --git a/lib/sasl/src/sasl.erl b/lib/sasl/src/sasl.erl
index d1babaffff..aed5f0da1f 100644
--- a/lib/sasl/src/sasl.erl
+++ b/lib/sasl/src/sasl.erl
@@ -81,27 +81,38 @@ get_mf() ->
     Dir = get_mf_dir(),
     MaxB = get_mf_maxb(),
     MaxF = get_mf_maxf(),
-    {Dir, MaxB, MaxF}.
+    case {Dir, MaxB, MaxF} of
+	{undefined,undefined,undefined} = R ->
+	    R;
+	{undefined,_,_} ->
+	    exit({missing_config, {sasl, error_logger_mf_dir}});
+	{_,undefined,_} ->
+	    exit({missing_config, {sasl, error_logger_mf_maxbytes}});
+	{_,_,undefined} ->
+	    exit({missing_config, {sasl, error_logger_mf_maxfiles}});
+	R ->
+	    R
+    end.
 
 get_mf_dir() ->
     case application:get_env(sasl, error_logger_mf_dir) of
-	{ok, false} -> throw(undefined);
+	{ok, false} -> undefined;
 	{ok, Dir} when is_list(Dir) -> Dir;
-	undefined -> throw(undefined);
+	undefined -> undefined;
 	{ok, Bad} -> exit({bad_config, {sasl, {error_logger_mf_dir, Bad}}})
     end.
 
 get_mf_maxb() ->
     case application:get_env(sasl, error_logger_mf_maxbytes) of
 	{ok, MaxB} when is_integer(MaxB) -> MaxB;
-	undefined -> throw(undefined);
+	undefined -> undefined;
 	{ok, Bad} -> exit({bad_config, {sasl, {error_logger_mf_maxbytes, Bad}}})
     end.
 
 get_mf_maxf() ->
     case application:get_env(sasl, error_logger_mf_maxfiles) of
 	{ok, MaxF} when is_integer(MaxF), MaxF > 0, MaxF < 256 -> MaxF;
-	undefined -> throw(undefined);
+	undefined -> undefined;
 	{ok, Bad} -> exit({bad_config, {sasl, {error_logger_mf_maxfiles, Bad}}})
     end.