hyperworks 进行优化分析时出现错误 提示如下：

There were 18 error messages during input processing.

  The first message is repeated below:

  *** ERROR # 173 ***

  A dependent d.o.f. defined more than once in rigid element entry.

     GRID ID =   191319

   component =        1

求告知应该怎样修改才能成功运行