各位大牛：我在建立組合墻時候使用的是殼單元。但是在提交計算的時候總是出現以下三個問題，希望大牛們能夠給解答一下 深表謝意：

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（這種話出現上百次）；

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.這出現的少。

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

我的模型接觸比較多，但是實在查不出問題。技術有限 實在難辦。