I was trying to make a boundary surface of two closed curves, where one of them surrounds the other one. The surface should only be the space between them.
I have to done this in other occasions and it always worked fine, but not for therse two curves, maybe because I used both polylines and control point curves when creating the curves?
I am sure there is an easy solution to my problem but I can’t figure this out myself. So I am really hoping for your input.