Set work plane twice.

[Bryan Thatcher]

When I create a reference plane in section, roof slope, then set the work plane to that reference plane, I can only create a roof on it once. Then no matter what, I cannot create a 2nd roof on that plane in the roof view. I don't know if that makes sense.

[Bryan Thatcher]

Bump!

I'm actually getting this error whenever I try to create a floor (roof) in some views.

[Dimitri Harvalias]

Not clear on what you're doing Bryan.
The sloped ref plane is created in a section view and then you are trying to create a roof that is aligned to that plane? What's the end result you're after?