Michael,
I'm still working on the same drawing and still having problems. I've tried to back as far as I could in order to make sure that I didn't have any little unconnected sections. In example #1 I have the basic curve that I'm trying to turn into a solid. When I finally get that I will use it to cut holes or depressions in other shapes that I will bring in later. In example #2 I have used the extrude command, telling it to cap both ends, and, hopefully, create a solid. As you can see, it didn't cap the ends. MoI says that the starting curve is a closed curve, so I don't immediately see what the problem is. Can you tell me how to turn that curve into a solid like the "almost" solid in example #2? I'm trying to understand this but I'm having a hard time.
Thanks,
Mark