12' wide dormer, flush with the sidewall on a Gable roof

[Elovia]

Welcome to the forum, Bob.

You should probably explain the results that you're seeing and the steps you've taken to obtain said results. Are you getting an error message or pop-up dialog? If so, what does it say? Without a better picture (oh, you could post an image too) of the problems you're encountering, our recommendations would be blind guessing.