error

You probably have some non-printable characters in your sourcecode line and/or your line breaks are non-Windows style.

Try this to convert your sourcecode file U123.pas...

procedure TForm1.Button1Click(Sender: TObject);
var
  sl : TStringList;
  s  : String;
  i  : integer;
begin
  if OpenDialog1.Execute then begin
    sl := TStringList.create;
    sl.LoadFromFile(OpenDialog1.FileName);
    s := AdjustLineBreaks(sl.text);
    for i := 1 to length(s) do begin
      if (s[ i ] < ' ') and not (s[i] in [#13,#10]) then begin
        s [ i ] := ' ';
      end;
    end;
    sl.text := s;
    sl.SaveToFile(OpenDialog1.FileName+'.new');
  end;
end;

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Above code adjusts line breaks to Windows style and replaces non-printable characters with spaces...