Error in : : /: ambiguous spec unknown spec Error: did not expect a 'name' tag with name/arity attributes here! Types: unknown type variable Data Types ambiguous type unknown type cannot find tag 'name' (anno ) unknown annotation   | : : | . Reference Manual () () /     .   .   ..  • Note: Warning: Code listing .:  Code listing .:      Reference Manual Erlang module Command C Library Name Application Exports Error : arity is mandatory when referring to specifications! Types: Table .:   Figure .:   ( ) { } [ ]