Probably, but what is the problem exactly ? I'm checking the original scene but cannot see any rendering issue...
Anyway, this should be suggested procedure for this, and other similar cases:
1) Remove progresivelly from the scene non-essential objects, while the problem is still reproducible.
2) Once you have a stripped scene, convert Forest to stand-alone items using Forest Tools (Utilities Panel).
3) Remove Forest Color from the materials, if used.
4) If it also fails, is a VRay problem (since Forest is no used): you must contact with ChaosGroup. If problem happens only using Forest, send us the scene to check it here.