Ok, still having troubles. TC 2017 is unusable, TC 2018 is unusable? Cant work on any of my drawings. LOL. Called tech support to see what they can do. They are supposed to call me back. Here is a description of what is going on now.... 2018,, wireframe render seems ok, go to hidden line, seems ok. Go to Draft render, view is very pixelated, when I go to iso view. Jagged edges. Then I go to Quality render, it locks up, will not go back to any of the other renders? 2017, is giving me fits to. open a drawing that I saved back to 2017, gives me an error message"Invalid Plastics/White was found. It will be ignored." Ok? Wireframe seems ok, go to hidden line, does not hide the lines. Stays the same?, go to draft render, seems ok. No quality render available? Zoom does not work on anything except wireframe? I'll take any advice I can get, I am willing to go to 2018 if I can get it to play right with me. I am running Deluxe on both.