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: 	 fold_expr_by_name/6, tuple_funpar/5,
  	 instrument_prog/2, uninstrument_prog/2, add_a_tag/5,register_pid/7, fun_to_process/5]).
  	 
  
  -include("../hrl/wrangler.hrl").
  
  -spec(rename_var/5::(filename(), integer(), integer(), string(), [dir()]) ->
  	     {error, string()} | {ok, string()}).
  rename_var(Fname, Line, Col, NewName, SearchPaths) ->
      case check_undo_process() of
  	ok ->
  	    Res=wrangler:rename_var(Fname, Line, Col, NewName, SearchPaths),
  	    check_wrangler_error_logger(),
  
negative.code: 	       
  -spec(instrument_prog/2::(filename(), [dir()]) ->{ok, [filename()]} | {error, string()}).
  instrument_prog(FName, SearchPaths) ->
      case initial_checking(SearchPaths) of 
  	ok ->
  	    Res = wrangler:instrument_prog(FName, SearchPaths),
  	    check_wrangler_error_logger(),
  