Kubotek Forum

I was actually using 2022 SP1, I had not yet upgraded. I then loaded 2023SP1 and it was the same. I have since established that it happens when I use the command "scale and centre viewport". The strange thing is that when I reverted to a previous version of the file and it happened again, if I just close and reopen the file it is OK, but if I save and reopen the parts are again still not visible. If I use view to get to the top or side view and then extents, it shows the view, but if I try to rotate it is gone again. I have now uploaded the file to KC support for analysis. For now, I disabled my quick button for that command. Hopefully, I can continue by just avoiding the command. Needless to say, I am saving very often!