We have a church project with a large addition to an existing church building, and then the interior of the existing building is getting completely rearranged. So all interior walls of the existing building are demolished, exterior walls remain, and then there will be new interior walls in the existing building.

So I was working over in the addition area, did several things, and suddenly noticed when I zoomed out that ALL new rooms in my existing building have become "unenclosed". I checked all the walls, and all have the top and bottom constraints at the same level, and the room objects are all on the same level as the walls. All walls are still set to "room bounding", and yet they don't seem to be enclosing anything.

I know it's something simple I'm overlooking. What could it be?