Mastercam won't recognize curve bottomed pocket.

[RayHolt]

Hi all,

I'm new to these forums, and to Mastercam. Attending SUNY Oswego, and we are trying to learn X6.

I created a simple 3D model, with a square, circle, and a pocket that has a curved bottom. I created the 3D solid in SpaceClaim.

When trying to do Toolpath -> Surface Rough -> Parallel/Contour, I have a problem because when it asks for a drive surface, and try to choose that pocket, it selects all lines in the drawing. Shows 20 drive surfaces. When I do verify this, it ignores the pocket with the curved bottom.

And I've tred FBM, and it simply ignores the pocket completely.

Stumped right now, and wondering if you all have any idea. I'll attach a screencap so you can see the "curved bottom" pocket I'm talking about. Can Mastercam just not handle this?

Thanks,
-Ray