Hmm, good question. I just spent an hour removing plugins in the programs folder to see if this would resolve the issue; it hasn’t. Unfortunately, I don’t remember which plugins I installed most recently and not all of them are labelled X64. I know the 64bit version of Nuendo has worked before. I guess I will have to work my way backwards to see if I can trace the problem back to a particular plugin.
Would a plugin issue be the only cause of this crash on both versions (i.e. 6.06 & 5.5.6)?