求教！此错误是怎么回事。

我在求解时出现了如下的错误N个，请问是怎么回事？要怎样改？谢谢！
***Warning 40571(SOL+571)
Initialization-node will not be moved
penetrating node near or at shell mid-surface
single surface interface # =1
penetrating node # = 10578
segment # = 2974
penetration = 9.9941E-01
remaining distance to shell midsurface =0.0000E+00
s,t = 1.0000E+00 1.0000E+00
penetrated segment nodes:
3147 2888 2867 3247