Sequence suddenly not exporting to Audition from Premiere (5.5)

I've been successfully exporting sections of my feature film (not the entire sequence - work area only), editing in Audition, exporting the mix files and replacing them in Premiere. Suddenly I get a long, drawn out error code below. Now, Audition asks for files it cannot find (nor can I), files that are not even connected with the work area I'm exporting, etc. I'm on a deadline, please help if you can. I'm on a Mac Pro 2.66 Ghz Quad core, 26 GB ram running Mavericks. Premiere and Audition 5.5.

Thanks!