When I select 1 category my script to select elements based on a type parameter and value works.
When I select multiple categories my scripts doesn't give me the expected result. Why? It still a list with elements...
I've made a video of the problem: http://autode.sk/2oMw7oR
And here is my script: Select element create selection set user interface.dyn (21.0 KB)
I'm using Revit 2017.2 & Dynamo 1.3.0