Vaulted ceiling causing issues with adjacent roof wall (interior to exterior)

[GroverJR]

I am using Home Designer Architectural (2020 version). I have an issue that keeps coming up.

 

The attic wall should be exterior to show the siding on the roof walls, but if I manually change the attic wall by extending the exterior wall it replaces the interior wall in the vaulted ceiling room.

 

Any thoughts on how to fix this? I am hoping it is something I am just overlooking.

 

Thanks in advance!

[Jo_Ann]

Architectural does not have the automatic "roof cuts wall at bottom function".

So, you need to cover up the interior siding with the "backsplash" tool.