The number of mods is insufficient and the second order value is too high Mr. Güray, thank you very much for your help, I solved the problem by turning off the superstructure interactive solution from the analysis settings, but this time, the number of modes is insufficient in dynamic analysis and the second order value on floors 1,2 increase the system rigidity is very high problems have occurred i tried a lot of things but not solved what can i do about this when i increase the number of mods it still freezes i would be very happy if you can help me. Thanks in advance