I am having issues completing this circular pattern. I have used solidworks for years and have never seen this error message. Things I have tried to resolve the issue: 1. Draw a centerline 2.turn on temporary axes 3.new reference geometry axis 4. Using the surface 5. turn off temporary axes. I do realize that I should be able to sketch this cut and do multiple revolves around my part (it has some complex surface curvature that needs attention), however this will cause alot more work, and with solidworks I have always found usually satisfying approaches to models. I just am unsure about this one. Someone please help me figure out my problem!? thanks again.