Scott,
Thanks for the reply. I had ceiling checked and still had this problem. I lowered the ceiling back to 93" from 105" and unchecked ceiling as kind of a last resort this morning. I figured that since I had drawn sloped ceiling planes then that might be sufficient for the truss to build. Since you have opened the plan you can see that you can draw a truss on the left side whether it is checked or not. It was checked when the room was built.
Greg