I followed your suggestion (by adding “Similar Types” Element and Graft the elements list), among the Sample Revit File that I have, but it is still not working (however, when I choose “Furniture” category, it works on a fly
Thank you so much for showing me the ropes, i.e. using Type Instances along with Query Types and Category Filter (Stream filter as well), now I understand the current Revit Geometry Type is different from the Revit Hosting component type.
“Rhino Inside” makes it easier to understand Revit.
Nothing is better than Rhino.
A curtain wall type instance doesn’t contain Element Geometry, you need to analyze the Curtain Wall to get the various geometries, or query curtain panels/mullions/etc. instead.