I’m having the same problem. Except it just started doing it in a project that I have rendered before just fine. It will run for maybe 15 or 20 frames and just stop, no error message or anything. I need to get the project out so I have been letting it render as far as it will go, then after it stops, see how far it has gone and start from that point. So in the end I will end up with a time line in my avid with lots of little 15 frame cuts.
I tried messing with the memory and cache setting but I can’t seem to get a good combo to help.