When ProRen can not rename a file, it enters the errorhandling-routine. What exactly ProRen does, you may specify in the ErrorMode-Gadget. You may chose between the options Rename, Abort and already shine}Request.

Let's say, tmp.123 could not be renamed to Pic.123, course Pic.123 already exists:

If you specified Abort, the renaming is canceled immediately, but all changes that were already done can be Undone.

If you specified Rename, Pic.123 will be renamed to err.123 (iff the ErrName-Gadget says err.). Now ProRen makes another try to rename tmp.123 to Pic.123.

If you specified Request, you will be asked via requester, if you want to abort or if you want to rename Pic.123. If you want to rename Pic.123, you may enter the new name for Pic.123, err.123 would be a suggestion.

If a file could not be renamed, though no file with the same name existed, a requester with the errormessage will appear. You may try to continue or you may abort. If you continue, you should first try to fix the problems. What exactly you have to do, depends on the error and may be read in the doc to the Rename-Command (shell).