David, I don't get that. You've bought all those plug-ins from different manufacturers and you've just stopped using them all because you believe that the common nominator, PACE, is just not working. I don't know if you were in contact with eventide, soundtoys, EW, zynaptiq etc. but if you were, they surely didn't tell you in unison that this is just a PACE issue they can't do anything about. An issue you can google and you don't really find a screaming crowed of angry windows/cubase/soundtoys users. I don't want to sidetrack this discussion further but I believe you can solve your issue. if you like, send me a PM and I'll try to help you with that.No worries! Ones I identified - spaces/ play, adaptiverb, blackhole, soundtoys panman/ decapitator. That was just trial and error disabling plugins until the project loaded again. That's pretty much every ilok based dev I have plugins from. Not an exhaustive list either, those are just the ones that were identified in the months until Steinberg pointed to it being an ilok issue. Since stopping use of ilok plugins, I've not had a repeat of the issue - that's coming up on 2 years since I first experienced it.