Ok so here's my eternal problem with maya.
Everytime I import a scene, for example a motorcycle I made in one scene, I want to pass it to the scene of the character.. so I import the motorcycle to the scene of a character, then try to render, but its imposible :
Mental ray encountered a fatal error.The system may have become unstable.Please save the scene and EXIT.

And thats it with all my proyects. I get stuck because maya dont want to render my scenes. its no even too complex, just some background and a character and stuff like that.
I need some help quickly, cuz I cant continue working with maya like this, right know im modeling a scene, something like a castle for my witch character, and right now im trying some test renders, and like i guess, its not going to render.