Hello,
I am struggling with same issue. I am working on VW2013.
I deleted most of my classes in order to tidy up, keeping only 'dimension class' and 'none class'.
Now when I open the file, a few symbols are missing. The text boxes for the sheet layers are not there either. But when I move my mouse on top, the box shows as dashed so they could be hidden. But all layers & classes are on!
Could it be that those symbols are linked to classes that no longer exist?
Any suggestions?
Thanks