I'm using Extensible storage to store project wide data on the ProjectInfo element. All is OK on Revit 2013, but on Revit 2012, when I save the project and try to reopen it, I've got a message saying that element 558 (ProjectInfo) is corrupted and then Revit crash.
The code is like this:
using (var entity = new Entity(Schema))
using (var tr = new Transaction(document))
if (tr.Start("Save settings") == TransactionStatus.Started)