Hey guys, I'm working my first car model and I'm having trouble. When I import all the textures and the exported model and play my game after it loads I either get a RC20 error or it crashes my whole computer. What would cause this?

At the bottom of Zmodeler in the small box, does it say any export errors or such? It does that if you've accidentally duplicated parts, or there's a COL error I believe. I suggest you look through your hierarchy.