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[Mark.Ackerley]

Hey,

Here’s a related thread you might find interesting… Lots of issues to consider!

Node Output is "null" but passes values

Thanks @solamour for the additional feedback. After thinking more about this, it seemed better to wrap all of this up into one node. One key piece was calling the Transaction manually rather than the TransactionManager. No matter how I tried to slice it, it kept telling me I couldn’t edit because no transaction was open. import System import clr clr.AddReference("RevitNodes") import Revit clr.AddReference('RevitAPI') from Autodesk.Revit.DB import * clr.AddReference('RevitServices') import Revit…

Of course if you click into the Steam node you can see how the python is working.

Hope that is useful,

Mark