The solution? Turn off the Far Clipping for the view in question. This made the Linked Import reappear and act in a predictable manner. Most of the views I'm working with already have Display Model set to 'Do not display', so it doesn't cause graphical problems for me to turn off the Far Clip.
This is why upgrading large projects to the next version of Revit is scary to me. I thought waiting to Web Update 2 would be safe - but it still wasn't!
Now I need to go through lots of views that have Linked DWGs and check if they are 'broken' and need the Far Clip to be turned off...
Some more information:
- The views in question seem to Print Preview and Print correctly, suggesting this is some sort of graphical problem?
- The Linked CAD Import is selectable, but not visible. Once selected, it is shown highlighted like any other element.
- Not all views are affected, only certain ones (most affected seem to the Linked Imports living in Detail Views and Sections). Drafting Views appear to be immune.
- If no one else has this problem, I may have to look into my hardware configuration.
- If a file ALREADY had No Clip set, the Import may STILL not display. Toggled the view to 'Clip with Line' and then back to 'No Clip' - and the Import reappeared!
- New Revit session has no effect
- New Local from Central has no effect
- Synchronise has no effect
- Reloading the affected Import has no effect