The SYSTEM CANNOT SOLVE THE LINE. WHEN ADDING LADDER TO THE SYSTEM, THE GEOMETRY CONTROL HAS ONLY OBJECTS WITH THE SAME NAME, THERE IS A WARNING...WHY CAN'T SOLVE.(WHY CAN'T SOLVE... , The stair supports are arranged according to the solution conditions together with the building. The beginning and the end of the stairs on the left side on the ground floor are not connected to any elements. Analysis can be made when arranging the stair supports according to the solution conditions independent of the building. Also, when the stairs are arranged together with the building according to the solution conditions, analysis according to the semi-rigid diaphragm option good work