List Management Rooms and Walls

Hello everybody,

I’m trying to get , for each Walls, the list of all the rooms that are enclosed by, to write later on a wall parameters the name of the rooms.

I found the nodes Room.Boundary or Room.Finishes that helps to know, for each room, what are the walls that enclose it, but I now need to “Invert” this list to get a list of the rooms by Wall.