Hi Paul, thanks for the reply. I'm fairly sure that's not it as I'm hardly running anything on the 32 bit server - maybe 4 instances of Alchemy, 3 or 4 of BFD, 2 of Moog Modular and 4 of Zebra. And infact, this problem was already well underway before I even installed Zebra.
Is it possible I'm overloading the 64 bit side of things? That side is pretty loaded up but should still have plenty of headroom. I'm wandering if it could also be a mechanical, non VE pro related problem although I can't see anything obvious.
Any other thoughts?
Really appreciate your help
best
FIL