XFEM报错求教？

The system error in std_findcutshape3d8_xfem -- nodal level set values might not be correct for element 1601 instance shijian-1, its philsm are -0.14039, 9.29325e-02, -0.33819, 4.87062e-02, 0.25780, -2.4979, 0.17139, 0.49614.，有哪位大佬知道，我用xfem算裂纹扩展时出现这个报错，有谁知道是为啥吗，怎么改正啊