请教大侠:我做的二维考虑渗流和变形耦合时基坑开挖分析,不考虑渗流时能算过去,但是耦合时,出现下面error
***ERROR: 17 reference cavity nodes may only be used as reference nodes for
other fluid cavities. Their only active degree of freedom must be
fluid pressure. The nodes have been identified in node set
ErrNodeRefCavityNode.
看了半天不知道错误是怎样产生的,急需得到高手指点。谢谢大侠能够留步解惑,感激不尽!