i thought maybe this should go into this forum (as i described it earlier in another forum)
http://bulkrenameutility.co.uk/forum/viewtopic.php?f=3&t=792#p2651
if you rename a bunch of folders and subfolders, and the parent folders are renamed first, then the previously selected subfolders report back a path file does not exist error, as its parent folder (and therefore path) has changed
some other feature suggestions as well:
http://bulkrenameutility.co.uk/forum/viewtopic.php?f=3&t=792#p2652