I am trying use the revolve cut feature on a part I need to make for school. Its the part used in ASME b5.54 for testing 5 axis CNC. I have attached a picture of the part so far. I need to cut the part 3 degrees with the axis of revolution as the centerline on the left of the part. Every time I try and use the feature I get a Rebuld Errors message saying Sketch is open, self-intersecting, or intersects the centerline. I've tried redoing the part from the top and revolving down into the part and I get the same message. I also tried remaking the part and start with the bottom square thinking that maybe it was because I had something wrong from a few previous things done on the part, but I still get the same message and I don't know what to do or why I am getting the message. Everything is fully defined. Any help would be great as I've been banging my head against the wall all weekend. Thanks for your help