I have been having this problem forever. And still can't figure it out. It's driving me frigg'n nuts. I have also just upgraded to a 2x2.6 Mac Pro, and Protools 7.1. SAME PROBLEM. it goes for to seconds and the error "Increase the H/W Buffer"appears. I increase the size, all combinations, No luck.I tried the Digi trouble shooting, sent a email to digi tech support detailing the problems. I cannot figure this out someone please help. I can now only suspect it's the hardware.(?)
Becker
post sound mixer - LA