[mastercamguru]

I took the time to convert your surface model to a wireframe for you and found multiple splines overlaid. Often engineers don't clean up their drawings and sometimes files don't convert cleanly into Mastercam. That creates chaining problems if you don't analyze your geometry first. I created lines and arcs to replace your surface edges and left the sloped surfaces for 3-d toolpath on the other side of the part. Generally speaking it is much easier to just delete the surfaces and toolpath standard geometry(lines and arcs) rather than surface geometry for 2-d toolpaths. Check your e-mail for the MC9 file. MCX/MCX2 will open it just fine. I think you will find it much easier to toolpath efficiently.