Thank You for the info on using hometalk, I have updated my signature info, and reviewed the references you provided.
I agree it was impossible to understand what was wrong using the info that I provided. I intended to attach the working Home Designer file but it was too large. I am including several camera views so that you can better understand my issue. The "Overview before" file shows the project prior to closing in the large slab, which is to be a carport with corner posts. I used room dividers for the three exterior walls around the slab. Once I closed in the slab to form the carport, the roof auto generated as seen in the "Overview After" and North and West View files. My intention was to have a simple full gable roof over the carport. The Western side (right side in North and West views) generated correctly from the lower edge, but terminated prior to reaching the gable peak in the center of the carport. The eastern side continued past the centerline forming the raised wall along the roof line. I have tried moving the walls slightly in and out, I also varying the roof pitch. These changes did not correct the issue. Any suggestions are sincerely appreciated. Than you..