Hello, I am doing a project in Z+2 floor Idestatic. There is no basement floor in my project. Basement 65 cm. I also adjusted the infloor curtains from the curtain settings and gave a level, the number of modes after analysis in my project was 55. Normally, I thought that 12 modes would be enough. I checked if there was an error in my drawings. When I delete my basement curtains, the mode 12 is sufficient. But when I draw the basement curtains, I get the warning that the number of modes is insufficient. What could be the reason? Respects.