Hello, "The system cannot be solved" message It is due to incorrect support conditions. It is also seen that the stair arms are not attached to the landing. The staircase has been rebuilt in the attached project. The lower edge is arranged as a fixed support as the staircase is not permanently attached to the foundations. Analysis can be done. Good work"Apokalips":15agr0qq" said:Good afternoon, I am getting the warning that the system cannot be resolved in the project I have stated in the attachment. There is no problem in the geometry control, why is the problem?