SQL10007N Message "-1390" could not be retrieved.

-bash-3.00# oslevel -r
5300-06
-bash-3.00# su - db2inst1
-bash-3.00$ db2level
DB21085I  Instance "db2inst1" uses "64" bits and DB2 code release "SQL09010"
with level identifier "02010107".
Informational tokens are "DB2 v9.1.0.0", "s060629", "AIX64", and Fix Pack "0".
Product is installed at "/opt/IBM/db2/V9.1".
执行下面语句出错
-bash-3.00# su - db2inst1 "-c /home/db2inst1/sqllib/adm/db2stop force"
SQL10007N Message "-1390" could not be retrieved.  Reason code: "3".

不管学什么，首先要问自己的是帮助文档在哪里，如何获得帮助信息。