Environment variable ORACLE_UNQNAME not defined

oracle11g上查看em状态时，出现错误：Environment variable ORACLE_UNQNAME not defined. Please set ORACLE_UNQNAME to database unique name.

解决方法：

Microsoft Windows XP [版本 5.1.2600]

(C) 版权所有 1985-2001 Microsoft Corp.

C:\Documents and Settings\Administrator>emctl status dbconsole

Environment variable ORACLE_UNQNAME not defined. Please set ORACLE_UNQNAME to da

tabase unique name.

C:\Documents and Settings\Administrator>emctl status dbconsole

Environment variable ORACLE_UNQNAME not defined. Please set ORACLE_UNQNAME to da

tabase unique name.

C:\Documents and Settings\Administrator>SET ORACLE_UNQNAME=ORCL（orcl为SID）

C:\Documents and Settings\Administrator>emctl status dbconsole

OC4J Configuration issue. E:\app\Administrator\product\11.2.0\dbhome_1/oc4j/j2ee

/OC4J_DBConsole_HZIT-shuzx_ORCL not found.

C:\Documents and Settings\Administrator>

还是不行，

到目录 目录\product\10.2.0\db_1\oc4j\j2ee 下发现只有OC4J_DBConsole_localhost_orcl目录，并没有OC4J_DBConsole_HZIT-shuzx_orcl这样的目录，然后设置oracle_hostname：oracle_hostname=localhost

还是不行。

取消设置。

没辙了。

------------------------------------------------

但是，奇迹出现了。

点好IP原先是固定的，设置为自动获取后居然好了。

C:\Documents and Settings\Administrator>emctl start dbconsole

Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0

Copyright (c) 1996, 2010 Oracle Corporation. All rights reserved.

https://localhost:1158/em/console/aboutApplication

Starting Oracle Enterprise Manager 11g Database Control ...请求的服务已经启动。

原来IP变了就出错了。现在把了网线再插上，重新分配了IP。

C:\Documents and Settings\Administrator>emctl start dbconsole

OC4J Configuration issue. E:\app\Administrator\product\11.2.0\dbhome_1/oc4j/j2ee

/OC4J_DBConsole_HZIT-shuzx_ORCL not found.

C:\Documents and Settings\Administrator>

又不行了。⊙﹏⊙b汗,

原来主机名或IP改变了就不行了，需要重现配置em。