Saving the model tells me that there are problems that can’t be fixed.
I repaired SU twice, but no result.
The first Blug Spot came by changing the axis in an octagon.
The second Blug Spot I don’t remember.
After that I couldn’t draw a Polygon witht more than 6 sides, needed 8.
Now I can’t edit Material.
All the screen symbols in Scenes are gone.
How can I rescue my model?