max 2011 vray 2.0 x64 displacement problem

[super gnu]

Hi guys. have a scene here with a 2d displaced floor and a 3d displaced brick wall. there are dirt maps all over the place, and a vray fur to put grass between the pavers. other than that its a simple scene with about 5 objects in.

it was rendering fine all day, until i detached some faces from the wall object. next render crashed with an unhandled exception.

if i turn off displacement in the render settings it doesn't crash, but if i turn off the 2 displacement modifiers manually, it still crashes.. strange. ive tried merging to a new scene.. doesn't help.

displacement modifiers are not set particularly high or anything, and as i said, was rendering quite happily in about 3 gig of ram up until about 20 mins ago..

any ideas?

[super gnu]

ahh and the disp. maps are in the modifiers, not in the materials..

[super gnu]

lol ok forget it and delete the thread. there -was- a disp. map in a sub material on the faces i detached. was causing problems somehow. no idea why but killing that fixed it.