hyperworks 進行優化分析時出現錯誤 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

求告知應該怎樣修改才能成功運行