Transition from Clerestory Roof to Shed Roof?

[Kbird]

ok now I get it , I thought the celestory windows were in the shed roof facing right but I couldn't see them in your "After" 3d image....

yes the room he "shoved over" is a gable

and I think the "shove over" is the issue , I just drew this as a L shaped house , assigned the gable walls and pitches as needed , then added the two internal walls per the Celestory Tut.
and it generated fine....

M.