anchor.diff:  	     {error, string()} | {ok, [filename()]}).
   tuple_to_record(File, FLine, FCol, LLine, LCol, 
                   RecName, FieldString, SearchPaths)->
  -    case check_undo_process() of
  +    case initial_checking(SearchPaths) of
   	ok -> Res = wrangler:tuple_to_record(File, FLine, FCol, LLine, LCol, 
   					     RecName, FieldString, SearchPaths),
   	      check_wrangler_error_logger(),
  
positive.code:     end.
  
  
  check_undo_process() ->
      case erlang:whereis(refactor_undo) of
  	undefined ->
  
negative.code:       (filename(), integer(), integer(), [dir()]) -> {ok, [{integer(), integer(), integer(), integer(), syntaxTree(), {syntaxTree(), integer()}}]}
  							 | {error, string()}).
  fold_expr_by_loc(FName, Line, Col, SearchPaths) ->
      case initial_checking(SearchPaths) of
        ok -> Res = wrangler:fold_expr_by_loc(FName, Line, Col, SearchPaths),
  	    check_wrangler_error_logger(),
  	    Res;
  