Good day, everyone! I try to study Dynamo. At the beginning I just copied the scripts to understand of how they work. Now I’m trying to expand the functionality. The idea of creating spaces from arch linked file with rooms and making the name and number the same is very useful. But the isue is that sometimes the linked file is large and I need to devide the whole operation into steps, using filter by levels. How should I use filtering by levels in Garret_Meierbachtol’s solution (attached). I tried BoolMask, but can’t get the correct output. Thanks a lot!!