Hi victoryuu, The errors I see in data entry are as follows: - Typical beam definition is not made in slabs D50 and D51. - The other one, for example, the rib beam on the far right of the S04 slab and the main beam are adjacent. For this, the starting distances of the rib teeth can be changed in a way that does not disturb the continuity. You can also enter panel-sized elements as panel objects and model them as shells.