Cannot recover HR user(Oracle10g,winXP)

Question

Friends ,
I take 11:05 am (07.04.08) a rman backup using following script :
run
allocate channel t1 type disk;
backup format 'df_%t_%s_%p'
(database);}
After the backup , Accidently I have deleted HR user And using the following script I cannot recover my HR user . The script with the error is the following :
RMAN> run {
2> set until time "TO_DATE('04/07/08
3> 11:10:00','MM/DD/YY HH24:MI:SS')";
4> allocate channel t1 type disk;
5> restore database;
6> recover database;
7> }
executing command: SET until clause
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of set command at 04/07/2008 14:15:18
RMAN-20207: UNTIL TIME or RECOVERY WINDOW is before RESETLOGS time
Plz tell me where is the problem ?

Answer 1

The problem is you executed an
alter database open resetlogs
command after taking the backup.
This resulted in a new incarnation of the database.
You don't post a version, and the answer is version dependent.
In 9i you can only recover from this situation when you are using a recovery catalog.
In that case you can reset the incarnation of the database with the rman reset incarnation command.
When you are not using a recovery catalog one can only hope you have an export.
In 10g the possibilities are different.
In both cases the procedures are documented and you are kindly requested to read the documentation.
Sybrand Bakker
Senior Oracle DBA