I am having an issue with Design Reverence Viewports disappearing.
I have the survey topo drawing, an external file, referenced into my drawing with a design reference viewport (x-ref). When I import it everything is fine. I come back to the drawing later and the reference is not viable.
The file is still there, but nothing is viable. I can hover over it and see the crop box and can even select it. All of the appropriate classes and layers are turned on. I can even double click on the reference viewport and open the original topo file and everything is there. I go back to the main file and nothing.
Any suggestions / solutions?