2 nodes are missing degree of freedoms.

lilpop

2 nodes are missing degree of freedoms. The MPC/Equation/kinematic coupling constraints can not be formed. The nodes have been identified in node set ErrNodeMissingDofConstrDef.这是使用了BeamMPC连接了线单元和壳单元时错误信息，求路过大佬指点。

yunduan

你所说的线单元是truss单元还是Beam单元，前者只有位移自由度，而后者既有平移自由度，也有转动自由度，与shell单元自由度一致。应将线单元定义为Beam单元。