Finally realizing that my PG Music Power Tracks program was not current, I downloaded and installed the upgrade to PowerTracks 2011 ver 1.
I'm inclined to agree with you concerning the corrupted file. I deleted BOTH tracks from this two-track PowerTracks file, and it still locks up the machine when I try to load it into Real Band (with NO tracks).
As an aside, PowerTracks 2011 errors out when trying to save this sequence file - but that's a topic for a different forum.
As for Bks files, there are currently 18 files in my PTBackup folder. With 250 sequence files, it has not been practical to save all those bks files for all that work. I do have, however, various versions of the multiple sequence files stored in external 1TB hard drives. I'll check for an older version of this sequence file.