[jbhouchin]

I posted this on one of the other threads:

I am on PT 10.0.1 running Mac Snow leopard and I got the same error.

Try, as dumb as this sounds, changing your playback engine in the setup menu to built in output. I just had the same error and it fixed it.

Don't try to launch a new session. Simply launch PT, close all error dialog prompts , and change the playback engine.

Hope this helps.