I am trying to design front wheel of american chopper. I was trying to do cut-extrude. When I first tried to cut-extrude, I was unable to select contours (in the cut-extrude). so, I sketch 2nd time, it is still showing me the same error but there was an additional error of open contours for one of the spline. The spline has 'coincident' relation with the line. Can someone help me with this please?