>if game (in dat file) has 100 or less roms, everything is OK, if
> has more then 100 roms (mame titles, flyers, ...), ClrMamePro cannot rename it.


That's nonsense. There isn't any number of entries limit.
Sounds like a system related issue. Maybe out of diskspace in cmpro\temp or cmpro\backup. Be sure you got enough free diskspace there. If you're sure that you got enough free disk, send me the dat and a file which doesn't rename.



If a file is detected as unneeded, its crc32 doesn't exist in the dat in the file...so either the zip got an error or the dat.
Send me the not-renamed mentioned file and the dat.

Roman Scherzer
ClrMamePro