Hello, my apologies @rienSWHGE I don't have an answer but have encountered the similar issue. Let me know if it's a different issue and I'll start a new thread?
There is an option in the roombook dialogue to include furniture or furniture elements from linked files. I have tested this and can't seem to get the families/furniture from a linked model into excel or even in the calculation view.
Is there something we need to do in the linked model with the families we want to include?