Friends, I seem to know the solution to my model's problem. Because there are many pairs of contacts in my model, I split their contact time, and then...

@negativevolume Hi! thank you for your reply again. I thought about the problem you mentioned, but I don't understand why another k file with the same...

@negativevolume I will check the question you mentioned and try to recalculate tomorrow morning. Thank you very much for your answers.