202 nodes may not be used with a multi-point constraint since they are also part of pretension section. The nodes have been identified in node set ErrNodeMPCPretenSec. 這是報錯的內容，我不知道我施加的螺栓載荷橫截面是否有問題。我是在螺栓螺桿上截取的橫截面，（我的螺桿和中間的夾具應該是沒有連接的）想知道各位大佬有什么好的辦法嗎？？