Multi-zone error while using butterfly for indoor airflow

I have a question which I’m trying to figure out. How to create indoor airflow for multi-zone models? How to assign different zones in butterfly? If two rooms are side-by-side connected by internal walls, how to input that in the “Butterfly_create case from geometries” component? I hope you get my question. I’ve attached how the model looks like and also the grasshopper script for your reference.
If you can walk me through it, that would be wonderful.
Thank you once again.