Hi - I had this happen in PT within the last year and never did get the reason figured out. Somehow the SEQ just didn't reassemble properly after an editing session. My old thread is possibly still posted - check it.
In short, be thankful that you had the backup and don't waste anymore time trying to figure out "why?" - an answer never surfaced.

Ian


Ian
My "Original Tunes" Site
My gene pool needs more chlorine.