Hi - I don't have memturbo. I have another program called RAM Idle PRO, but it hasn't helped. Anyway, actual memory doesn't seem to be the problem - when I get the out-of-memory error, I actually still have nearly 1300 megs of unused RAM. It's just that P6 either can't see it, or can't access it. The scene isn't the problem either - over the past week I've used the same set-up on a daily basis with no problems. I'm guessing I'm screwed. I've just noticed that when I DID try to save the file, P6 kindly wrote it as a zero-byte file, so I've lost a lot more than just what I've done today. I think I'm just going to give up, start again, and use P5 this time. I think a bug this size just makes P6 too much hassle until they sort it out. Thanks! Morph