DynamoDS/Dynamo — pull request #2103 by Randy-Ma (2014-08-06 08:14:34+00:00)
Title: Fix MAGN-2575 [CRASH] when there are some nodes which are referencing geometries from Revit.

@lukechurch

In this case, a Revit document is opened, closed. Then when it is re-opened, we need to reset the data for the new document. Otherwise for the selection node, the elements there will still come from the old documents which will cause exceptions/crash later. This submission exactly fixes this problem.