Restore spfile from rman backup ---- error.

Hi,
I am trying to execute recovery on new machine ...
I have done the following steps..
I have one database as ora10g2 as peroduction database on one machine as hosta
I have created a catalog on another machine cora10g2 (hostb)
I have taken a full backup from hosta as per following ...
the following command execute from hosta machine.
$ rman target sys/<passwd>@ora10g2 catalog rman/rman@cora10g2 ...
Backup completed ...
Now I am trying to restore this backup on hostb machine where i have already rman catlog database ..
I have done the following setting ...on host b
set oracle_sid=DUP
and execute following command ...
rman target / catalog rman/rman@cora10g2
RMAN> set dbid 2760732370
executing command: SET DBID
database name is "BAAN10G2" and DBID is 2760732370
RMAN>
RMAN>
RMAN> startup force nomount ;
startup failed: ORA-01078: failure in processing system parameters
LRM-00109: could not open parameter file '/oracle/dbs/baan10g2/dbs/initbaan10g2.ora'
starting Oracle instance without parameter file for retrival of spfile
Oracle instance started
Total System Global Area 159383552 bytes
Fixed Size 1977112 bytes
Variable Size 67114216 bytes
Database Buffers 83886080 bytes
Redo Buffers 6406144 bytes
RMAN>
RMAN>
RMAN>
RMAN> show all ;
RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1;
CONFIGURE BACKUP OPTIMIZATION ON;
CONFIGURE DEFAULT DEVICE TYPE TO DISK;
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/rman/backup/control/cntrl_%F';
CONFIGURE DEVICE TYPE DISK PARALLELISM 4 BACKUP TYPE TO BACKUPSET;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/baanora3/rman/ora10g2/bkup_db_%d_s%s_P%p_t%t' MAXPIECESIZE 1024;
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
RMAN>
RMAN>
RMAN> list backup of spfile ;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
2420 Full 7.33M DISK 00:00:01 14-JUN-07
BP Key: 2426 Status: AVAILABLE Compressed: NO Tag: TAG20070614T182935
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070614-00
SPFILE Included: Modification time: 14-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2509 Full 7.33M DISK 00:00:01 15-JUN-07
BP Key: 2515 Status: AVAILABLE Compressed: NO Tag: TAG20070615T130416
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070615-00
SPFILE Included: Modification time: 15-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2694 Full 7.33M DISK 00:00:01 15-JUN-07
BP Key: 2739 Status: AVAILABLE Compressed: NO Tag: TAG20070615T131703
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070615-01
SPFILE Included: Modification time: 15-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2760 Full 80.00K DISK 00:00:01 15-JUN-07
BP Key: 2763 Status: AVAILABLE Compressed: NO Tag: TAG20070615T163437
Piece Name: /rman/spfile/spfile.ora
SPFILE Included: Modification time: 15-JUN-07
BS Key Type LV Size Device Type Elapsed Time Completion Time
2769 Full 7.33M DISK 00:00:02 15-JUN-07
BP Key: 2771 Status: AVAILABLE Compressed: NO Tag: TAG20070615T163441
Piece Name: /rman/backup/control/cntrl_c-2760732370-20070615-02
SPFILE Included: Modification time: 15-JUN-07
RMAN>
RMAN>
RMAN> restore spfile from autobackup ;
Starting restore at 19-JUN-07
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=36 devtype=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: sid=35 devtype=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: sid=34 devtype=DISK
allocated channel: ORA_DISK_4
channel ORA_DISK_4: sid=33 devtype=DISK
channel ORA_DISK_1: looking for autobackup on day: 20070619
channel ORA_DISK_1: looking for autobackup on day: 20070618
channel ORA_DISK_1: looking for autobackup on day: 20070617
channel ORA_DISK_1: looking for autobackup on day: 20070616
channel ORA_DISK_1: looking for autobackup on day: 20070615
channel ORA_DISK_1: looking for autobackup on day: 20070614
channel ORA_DISK_1: looking for autobackup on day: 20070613
channel ORA_DISK_1: no autobackup in 7 days found
channel ORA_DISK_2: looking for autobackup on day: 20070619
channel ORA_DISK_2: looking for autobackup on day: 20070618
channel ORA_DISK_2: looking for autobackup on day: 20070617
channel ORA_DISK_2: looking for autobackup on day: 20070616
channel ORA_DISK_2: looking for autobackup on day: 20070615
channel ORA_DISK_2: looking for autobackup on day: 20070614
channel ORA_DISK_2: looking for autobackup on day: 20070613
channel ORA_DISK_2: no autobackup in 7 days found
channel ORA_DISK_3: looking for autobackup on day: 20070619
channel ORA_DISK_3: looking for autobackup on day: 20070618
channel ORA_DISK_3: looking for autobackup on day: 20070617
channel ORA_DISK_3: looking for autobackup on day: 20070616
channel ORA_DISK_3: looking for autobackup on day: 20070615
channel ORA_DISK_3: looking for autobackup on day: 20070614
channel ORA_DISK_3: looking for autobackup on day: 20070613
channel ORA_DISK_3: no autobackup in 7 days found
channel ORA_DISK_4: looking for autobackup on day: 20070619
channel ORA_DISK_4: looking for autobackup on day: 20070618
channel ORA_DISK_4: looking for autobackup on day: 20070617
channel ORA_DISK_4: looking for autobackup on day: 20070616
channel ORA_DISK_4: looking for autobackup on day: 20070615
channel ORA_DISK_4: looking for autobackup on day: 20070614
channel ORA_DISK_4: looking for autobackup on day: 20070613
channel ORA_DISK_4: no autobackup in 7 days found
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 06/19/2007 18:00:13
RMAN-06172: no autobackup found or specified handle is not a valid copy or piece
RMAN>
I am not able to restore spfile from rman backup ;;;

Hi,
I would like to know few things
1. How are you setting the db_name ? you can set db_id at RMAN, how are you setting the db_name ?
2. Do you have any default init file at default location ? if yes, is the db_name parameter set correctly in that file ?
Since spfile is yet to be restored, you must set the db_name parameter correctly before you start spfile restore.This can be done with init file at default location which can even contain just one paremeter i.e db_name.

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