view3D collector iterator exception

[benrobinson20]

Ive been sent a model by a user who is unable to run HBERT.
When i debug im getting an exception trying to itterate over the collector of 3D views. Ive not come across this before, does it mean something is corrupt in the database?

Then when looking at this function and the temporary transaction. Could it be simplified by checking the parameter
view.get_Parameter(BuiltInParameter.VIEWER_SHEET_NUMBER);

Its integer value is always 0 and string value "---" if the view is not placed on a sheet.

I will wetransfer the Revit file to you. FYI its 2020

[ThomasMahon]

Hi @benrobinson20 this is a strange one - all I can think of which may cause this is if the user ran the tool once and it failed before the rollback then ran the tool again and saw that exception as the temp sheet which wasn't properly committed was garbage collected, or its not related to HBERT at all and they have run another external application or Dynamo script which has left an open transaction.

Really its only going to be possible to find out by having the file which caused this exception and getting the steps the user took to reproduce the exception.