Well, thank you anyway. I have another question, I was trying to redo the exercise for the 1000th time, is it normal that whenever I mesh the inicial structure I get 2 lines of nodes for the oblique beam? For your information: I used beams188 for all of the elements, an Omega section for the oblique beam and a HEB100 for the vertical pillar. I dont know which nodes i should choose when coupling dof’s with the purlings. Also I used an external Keypoint to orientate the section.