Even when I make a NURBS primitive circle, when I go to create a cloth panel, I get the error message: "Error: Curves must form a closed loop. Check for unconnected or extra curves." Now, I understand that NURBS vertices don't actually "weld," but I have no solution to this problem. (I also tried to use "close open curves but that just toggles and is not the answer.) Does anyone know why I can't get a "closed loop?"