Hello. I wanted to create a shape using the RailRevolve command, but it gives this error. I obtained the isocurves from the sides of the ring. Then, I created a profile curve using these isocurves with the blendcrv command. I used the RailRevolve command. I used the profile curve and the curve on the top of the ring as a railcurve. But this error occurred while creating a surface. How can this problem be solved? Is it a problem with the surface of the ring?
signet ring.3dm (368.1 KB)