This seems like an odd happening to me. I can create a part with construction lines within a part with solid object lines and revolve it around an axis with no problems or issues. A co-worker of mine can do the same thing with no issues or problems also. Our supervisor can not do that revolve. I am unsure what he is getting for an error message if anything. We are all running the same version SW2019. What would be the cause of him not being able to perform the same action that we can do. I can't find anything in the settings on his computer that is different on mine. It's quite a pickle!