Hello Mike. I've got the same with your drawing. But I've inserted some structural elements and a truss and ..... tata.... That works. Maybe it's the house rigging points tool. Personally i don't use those. Cause if you add a "house rigging point to a knot" on a beam. You get the knot loads but it won't calculate the load on the beam "Structural Member". If you use the click inserting mode it will work by the way. But not on a inserted truss. It