Corrupted Session

I've got a session file that has gone bonkers. Looped drum track shows that it's there but no audio. Guitar track plays when soloed then stops and a tamborine starts. On several tracks there is bleed from other tracks when soloed. I've killed all my sends.

What is going on?

Also, am I supposed to have ultrabeat? It's nowhere to be found. Also I drag third party loops into the session and there is no audio. I'm beginning to think that the program is not functioning normally.

Message was edited by: Rusty K