Not completely sure if im on the right spot to ask this question but anyway I have an windows XP SP2 laptop with exiftool.exe (6.90) a jpg file called test.jpg in the directory c:\test and exiftool.exe in the same directory i open a commandbox run cmd and issue the following statement Exiftool "-DateTimeOriginal+=5:10:2 10:48:0" test.jpg i get the errormessage error renaming test.jpg and if i do a DIR of the test directory is see test.jpg AND a file called test.jpg_exiftool_tmp the tmp file has the requested exif data changed, the file test.jpg is still in its original state.