You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.
Notice that poly2_b{2} command is broken in 16, and still not fixed, nearly one year later.
In case of rotation or symetry, fill origin and orientation don't work.
It concerns all objects using this command, not only roof accessories.