It was stated to you, these commands were developed for steel, so when you define, incorrect geometry may occur, which is what happens when you enter automatic purlin, and when you enter only one purlin, you cannot select reinforced concrete elements to form the joint. Therefore, in order to get the drawings for the solution, you can enter the steel beam instead of the reinforced concrete, model with the purlin and get the drawings of the connections, you need to manually draw the connection detail of one anchor to the reinforced concrete in the reinforced concrete.