I read what Avid said about it with debugadm 2 in the console, tried changing sample rate, and other things suggested on the Avid forum.
I'm running a 2010 iMac with upgraded ram (16gb.) This project was working perfectly until now, had no playback issues. Now I'm getting this all the time. Got a similar error on a pro machine but all we had to do was restart the AJA card and it was fine.
I'm at home with an old iMac and am at my wits end. What can I do? I've been searching the internet high and low.