How to delete all imported cad/symbol in family in Revit by dynamo?

Try only these categories you are sure there have cad import instance, system family doesnt have it…i have never tried with so many categories, i would probably do it categori by categoori one at time, more safe…or do it with birdtool here is an example…first save these families out [can be automated] run the graph via Birdtool on these files load it back again [can be automated]

Revit_vmAodjeBZk

If you wanna automate export / load families with dynamo then something here could work…

or just do it manuelly as here…for save out and just drag them in again after birdtool run

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