各位大牛：我在建立组合墙时候使用的是壳单元。但是在提交计算的时候总是出现以下三个问题，希望大牛们能够给解答一下 深表谢意：

1：The node 1612 instance part-lizhu-c-c-2 of surface assembly_lizhuface-qianmian has underlying shell elements with spos and sneg face identifiers（这种话出现上百次）；

2：Whenever a translation (rotation) dof at a node is constrained by a kinematic coupling definition the translation (rotation) dofs for that node cannot be included in any other constraint including mpcs, rigid bodies, etc.这出现的少。

3：Boundary conditions are specified on inactive dof of 1815 nodes. The nodes have been identified in node set WarnNodeBCInactiveDof.这种又怎么解决。

我的模型接触比较多，但是实在查不出问题。技术有限 实在难办。