my scene had a large number of Instances, I read that there is a time saver if you use instanciate instead of replicate, but when I use instanciate VRay uses all the avaliable ram and then crashes after a coupple of hours (over network). 
System:
Max5.1
VRay Advanced 1.09 (Haven’t updated to the latest one yet)
Windows XP
any thoughts or comments?
Cheers _Jay
Click on the “instanciate” in the render settings…you find it in the “system” rollout..
-Tom
thats what I do and it’s giving me problems 
There was a bug where VRay would not free all data associated with instances from one frame to the next… this should be fixed in the latest 1.09.03x builds, but I’d advise you to wait for the next one before upgrading 
Best regards,
Vlado
thanks for the post Vlado, yeah it would render one frame fine and crash on the next.
Vlado, is this new build inprooved anything on mirrored instances?
I doubt it since that is a max issue, Use the mirror modifier, it does not have the bug.
is it a max issue that mirrored instances render with no GI when using the instantiate oprion in Vray?