Nastan 频响分析，有报错，但还是计算完了，不知道报错如何解决？

 17:13:17  Solution of the system equations for frequency response started.

 17:13:17  Solution of the system equations for frequency response successfully completed.

 17:13:17  183673 records read from JID file "c:/users/administrator/desktop/fe-57/frequency_analysis/fe_5  no damper6.bdf"

 17:13:17  NSEXIT: EXIT(20)

 17:13:17  Analysis complete  -20

-20意思就是没有算完的吧？然后搜f06有个fatal，如下：

 *** USER FATAL MESSAGE 2170 (PARTN2)

     BOTH THE ROW AND COLUMN PARTITIONING VECTORS ARE PURGED AND ONLY ONE MAY BE.

0FATAL ERROR

1                                        * * * END OF JOB * * *

请问这个fatal是什么意思？从哪里去着手解决，百度下查报错代码也没查到。