Strange crash when using custom model for a vehicle

Basically, I am loading a map with a prop_vehicle_jeep using a custom model. But it crashes just before the game would normally begin to render.

http://img441.imageshack.us/img441/6329/modelcrash.png

Any ideas?

Looks like the error is saying that the model is in contact with the world. What map are you using and is the jeep already in the map, or are you spawning it?

Jeep is already in the map, it’s a custom map and this error happens with all maps I put the vehicle in.
It’s not always displacement collision though. I once had a default jeep next to it and it caused a similar error.

Is the model rigged up as a driveable vehicle?

Yes.