Bad data while translating MIDI chunk list

[prockmat]

A few days ago I did a lot of editing to a MIDI piano track- tempo changes, quantizing parts, etc... Today when I came back to continue working on the same session, I recieved this message: "Could not complete your request because bad data was encountered while translating MIDI chunk list." Because of this, I am unable to open the session. I opened a new session and tried to import the tracks one by one, thinking this might get me around which ever "bad MIDI chunk" there was, but no luck. I can't even import the audio tracks that were recorded, or even any aux tracks involved with the session. All of the backup sessions give me the same message. The only thing I can think of to do next is to import the audio files and reassemble the session that way (thankfully the song is still in simple enough stage to be able to do so) but I would really like to keep the MIDI tracks and edits (especially the tempo map) if possible. And yes, I've trashed prefs and restarted, ran disk utility on the drive and all that... other sessions with audio and MIDI open fine- it appears this session is the only one affected.

Any ideas or suggestions?

Running PT 7.0 LE on a Dual 1GHz G4 with 10.4.7

[nikki-k]

Did you happen to have auto back-up on?
It is HIGHLY suggested to do so.

I have had this happen before, and the backup was the resolution. Importing can work, it just takes patience and a bit-by-bit, crumb-by-crumb workflow.

[prockmat]

Yes, auto-backup is on and all of the auto-backup files have the same issue. I've checked all of them. I did a "save as" at one point, and it seems like everything from that point is messed up. Unfortunately, the session before the "save as" only has the basic midi recording (pre-edit)

[nikki-k]

Wow. Yeah, I have experienced this as well. Unfortunately, I had to go back to an earlier, unedited save. I will rack my brain for an instance when I did not, but I personally dont recall another way out