Answered
Peter SpierCorrect answer
Community Expert
November 3, 2024
If it's not actually in use there may be an errant lock file (.idlk) in the folder for the file which wasn't properly deleted when the file was closed. It's also possible yiou really don't have the correct permissions (what's your OS?), but the first thing I would do is reboot the system and see fi the error disappears.
