Hello, I had the project calculated, there is no tiling error. My suggestions: --Make the elevator curtains as a group, --Don't make cantilevers from K05-K12-K11 beams or columns, --K16 beam k18-k23 should be supported, add new K16a, k23-k27 should be supported, --K01 beam should be single between two columns, k21 beam Let it sink into this beam, --Put a column at the intersection of 4 and B axis and K09-K10 to form a frame, --Remove the pillars on the beams. Unver ÖZCAN