connecting garage to house? (roof)

[ambrozac]

The garage is connected by a typical outside house wall with no breezeway, a door is in the garage. I used create gable/roof line to get the roof but it isn't recognized.

When you say the garage is connected by "a" typical outside house wall, are you meaning just one wall? Are you not forming a room definition between the house and garage, so you can have a roof above? It might would be helpful to post a picture of the portion of the plan you're working on.