Rman backup or Delete obsolete fails with RMAN-20020: DATABASE INCARNATION NOT SET
使用rman备份或者删除旧的文件的时候报如下错误：
RMAN-00571:
RMAN-03015: error occurred in stored script. abc
RMAN-03002: failure of delete command at 09/15/2010 04:05:41
RMAN-06004: ORACLE error from recovery catalog database:
RMAN-20020: database incarnation not set
如果受影响的数据库版本>= 10.2.0.4,11.1.0.7,11.2.0.1
说明有多个数据库在使用catalog 数据库 (10g ,9i and 11g)
原因：
bug 造成的：
Bug 9873162 --> Closed as Duplicate of Bug 9577583 --> Closed as Duplicate of Base Bug <<9577583>>
Abstract: RMAN BACKUP FAILS WITH RMAN-20020: DATABASE INCARNATION NOT SET
Fixed :-: 12.1
解决方法：
Download and apply One off patch using the following link Patch 9577583
The patch needs to be applied to the Oracle HOME where the Catalog database resides.
