Thanks for the quick reply,
No I am certain they picked the solid option, (I watched them choose it ). The part is fine when it is imported in, the solid part symbol comes up beside the part name. The symbol changes when I alter the part. I have also got them to create an iges file, it seems to a little better but in certain cases it does the same thing. I’m positive it is something I’m doing that is causing it to change from a solid model to a surface model, but I’m not sure why it is doing it.
Again thanks for the help