Admin Help!!! Pro tools unexpectedly quitting

[leerix]

I recently updated to 7.3.1 cs5. The first session i started with the update crashed on me 5 times. I trashed preferences and databases and restarted. When I tried to reopen the file Pro tools unexpectedly quit. I opened a new session and imported all the data, it worked for the day. Next time I tried to open the file Pro tools unexpectedly quits again. Now I can't even open the session without Pro tools unexpectedly quitting on me. The session is all Midi data with RTAS plugs. NI Komplete 3 and stylus mostly. I haven't had any problems like this before. any ideas? Is it the RTAS plugs? The software? Maybe even hardware? Anyone else with a similar deal? Thanks

Intel mac pro dual 2.66
OSX 10.4.9
Pro tools 7.3.1 CS5 HD 3 accel 96 I/O
4 gigs ram

[BaileyBass]

Is it happening only on the session you mentioned? Or all sessions. If it is only the one mentioned, try creating another new session and import data. Sounds like a corrupt session. If it continues after this, repeat. and don't import the RTAS plugs and see what happens.