Hello, In the project, a small piece of beam remained at the junction of K32-k35 beams on normal floors. In addition, some stair abutments on some floors were arranged according to the solution conditions together with the structure, but analysis was made according to the full rigid diaphragm option in the Analysis Settings. When the small beam parts are deleted and the stair supports are arranged according to the solution conditions independent of the structure, analysis can be made in the project. Apart from that; The tile spacing command does not work on ribbed tiles. Create the gap of the S19 ribbed slab on the ground floor with the slab edge command. In addition, I think it would be appropriate to arrange the ribs in the y direction so that they press the K02-K06 beams so that the S19 rib does not work on the console. Good work