Missing components or faces during rendering.

Has anyone experienced the visual loss of a face or acomplete component during rendering?

It seems that any face that has a round or spherical shape is proneto loss. All is well during modifications/keyframing even throughcamera view, it is only through rendering that loss happens.
Sometimes when a component is close to being out of the frame itdisappears then reappears when well back in to the frame.

Out of 200+ parts 3-6 would be missing.

Tried:
50% rate rendering
Reducing the SolidWorks screen
Rebuilding, saving, reopening.


As soon as this is posted i will reinstall my video driver and seeif that helps.SolidworksMotion Studies