WHY do MY models crash maps?

[donut3.5]

Ok, there's something horribly wrong with my models...
When I try to import about 80% of them, they crash my freaking map...
What causes them to do so?
Everyone else's works fine...
But mine for some reason crash maps. And I don't know why. It's really really annoying, and I need my models for my campaign...
GRRRRR...
Someone please help...
--donut3.5--

 

[Cavman]

I had the same problem. i'm not quite sure what it is, but my Kale'Vork Gunner model did it. I figured out it was the skin for him, so maybe your converting skins wrong. This is the best I can tell you.

 

[Rao Dao Zao]

In the case of marine-based models, it's negative maximum extents and positive minimum extents. Maxs should always be positive and mins should always be negative. At least in this case.