good day, the raft foundation was not equipped in its current state, I made all the basement and floor slabs 15cm, when I analyzed, the raft saved, then I got it back. It was 12cm. It did not save the raft in the analysis, so when I made the same slabs to 15cm and analyzed again, the raft did not save it... I've had it too, it must be a very interesting problem, what could it be related to? Also, what does it change that 25/175 dimensional columns are curtains? If I make a curtain, will it save, if so, can the columns turn into curtains directly? I would be very grateful if anyone with knowledge could help me..thanks..