This is an issue that should be caught during the QA - testing before sending the model to the other stakeholders.

It can occur with Wall sweeps, curtain wall doors, windows, and panels.


These panels, for some reason, are corrupt. It's possible to double-check this by trying to enter any value on any parameters on these panels. These need to be "redone" before importing. 



To check that this is the issue, undo the import so the original panels exist in the model.



Use the ID numbers to select elements by id, Manage → Selection by Id


Enter the id from the warning message, once selected, locate it with using "Selection box". This will isolate the object in a 3D view.



Enter any value on any parameter on the panel, door, window, or wall sweep. If they collapse, they are corrupt and need to be re-done by the stakeholder.