anchor.diff:  check_parameters(FirstPar, Number, Arity, FunPatterns, AppNode, AppPar) ->
       case (Number < 1) or (Number > Arity) of
         true ->
  -	  {error,
  -		"It is not possible to tuple " ++  integer_to_list(Number) ++ " parameters"};
  +	  throw({error,
  +		"It is not possible to tuple " ++  integer_to_list(Number) ++ " parameters for function selected."});
         false ->
   	  case AppNode of
   	    [] -> search_par(FunPatterns, Number, FirstPar);
  
positive.code: 				    case check_is_callback_fun(Info, FunName, Arity) of 
  					ok ->  ?wrangler_io("The current file under refactoring is:\n~p\n", [FileName]),
  					       performe_refactoring(AnnAST, Info, Parameters, FunName, Arity, FunNode,
  								    C, Mod, SearchPaths, FileName, Editor);
  					{error, Reason} -> {error, Reason}
  				    end;
  				{error, Reason} -> {error, Reason}
  
negative.code: %% 
  %% @end
  %% =====================================================================
  tuple_parameters_in_client_modules(Files, Name, Arity, C, N, Mod, TabWidth)->
    case Files of
      [] -> [];
      [F | Fs] ->
  	  ?wrangler_io("The current file under refactoring is:\n~p\n", [F]),
  	  {ok, {AnnAST, Info}}= refac_util:parse_annotate_file(F, true, [], TabWidth),
  	  {AnnAST1, _} = tuple_parameters_in_client_modules_1({AnnAST, Info}, 
  							      Name, Arity, C, N, Mod),
            [{{F, F}, AnnAST1} | 
  	   tuple_parameters_in_client_modules(Fs,Name,Arity, C, N, Mod,TabWidth)]
    end.
  
  %% =====================================================================
  