I have a problem with my viewports not displaying and disappearing when trying to copy them, sycronize them, and create new ones.
When I create new ones, existing viewports disappear, leaving just the viewport frame. I cannot edit them, or activate them. However when I select them, it shows up as viewports in properties. Also I have drawn them on separate layers dedicated to my viewports. They are not on Defpoints layers.
The other odd thing is the viewports plot correctly and show up correctly in print preview.
I have a brand new computer workstation with the latest Nvidia Quadro graphics card and 32 GB of RAM.
this problem happens for one particular file. when I open a new drawing from our template or another drawing the problem does not occur. I am holding off on doing a wblock at last resort.
See attahced images.