Basically, the issue goes something like this: Revit 2012 can’t find a linked dwg anymore. When I try to reload it, Revit says the file doesn’t exist. There is an other linked dwg in the same folder, which still loads fine.
Here is one solution. Well, its not really a solution, more of a method that can be used to fix this problem:
1) make view templates for the graphical overrides of the imported dwg (Overrides import) 2) remove the file from the project 3) save under new name 4) reopen the project and Link CAD the same dwg file 5) apply the view template for graphical overrides 6) check all views, if you imported to all views 7) redo dimensions, if there were any connecting the linked dwg with the model
This happened to me recently on a very big workshared project. Turning off the Crop of the view made the links reappear, but when I zoomed in, they disappeared again!
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…
UPDATE 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
See video below (to prove that what I’m saying is true)