Monolithic Slab is not checked in the Rebuild Foundation setting. But I now have a new problem. I tried to just delete everything in that area so I could start completely over, and now it automatically puts a roof in the middle of the first-floor area. Any time I try to redraw anything in that area, the roof intersects with it, creating odd-shaped walls, with the roof remaining in the same spot. Even if I try to create a second story room directly above it, the roof remains in the same spot on the first floor in the middle of the layer. I must have some sort of slim piece of a wall somewhere that I can't find to delete. I've tried to delete the entire roof, and start over, but I still can't find any piece of wall anywhere in that lower left corner that could explain it generating that roof in the middle of the first floor. And when I try to redraw the vestibule on level 0 and the entry on level 1, the entry won't let me label it on level 1, and it has no floor at all now.
I'm trying to create an entry on the main floor, with a vestibule underneath that connects the basement to a greenhouse along the south side of the house. The vestibule would be on level 0, with the entry above it. The entry and vestibule would be the mirror opposite of the entry and vestibule on the right side of the duplex plan. The left-side wall of the greenhouse is now deleted, eliminating the floor in the left greenhouse, so it is no longer labeled on the left side. But the area would be the mirrored duplicate of the right side of the duplex. The roof only seems to be visible in camera mode. I can't see it on the plan, for some reason. I'd gladly go back to the 4" thick floor on the main floor entry, but I can't even redraw it now.
Zero Net Duplex.zip