Family Type Parameter deletes family

[Nick_Boyts]

Possibly related to this:

Family.ByName Removing Loaded Families

Good morning folks! Have a bit of a head scratcher - was wondering if anyone had any insights for me. I have a list of Families and I want to see if they exist in the project file. Simple --> [image] [image] The problem exists when this node is discconnected, it actually deletes all the families from the project. See --> [image] [image] Any reason why? I’m concerned this will become a problem down the road during certain functions. This may not actually be a problem when all is said an…