LS-prepost中梁单元的方向节点未定义？ 80

错误如下：

*** Error 20225 (STR+225)

     orientation node for beam element # 334239 is undefined

 *** Error 20211 (STR+211)

     reading element card for beam element

     undefined node #           0

     334239         6    357873    357874         0         0         0

     input phase will continue if possible