RMAN restore

[yotot]

I check my backup full and RMAN shows me that is correct

RMAN-08502: set_count=26 set_stamp=495201800 creation_time=28-MAY-03
RMAN-08023: channel t1: restored backup piece 1
RMAN-08511: piece handle=Backup_full_DATABASE_26_1 tag=null params=NULL
RMAN-08098: channel t1: validation complete


But when I try to restore controlfile or database It says
the backup is not valid

RMAN-03002: failure during compilation of command
RMAN-03013: command type: restore
RMAN-03002: failure during compilation of command
RMAN-03013: command type: IRESTORE
RMAN-06026: some targets not found - aborting restore
RMAN-06024: no backup or copy of the controlfile found to restore

How to specified during restore the name
of piece handle = 'Backup_full_DATABASE_26_1'
something like that
run {
allocate channel t1 type 'SBT_TAPE'
parms 'ENV=(NSR_SERVER=toto.com,NSR_DATA_VOLUME_POOL=Default)';
restore controlfile;
release channel t1;
}

[BV1963]

Post output of following:

>rman

list backup of controlfile;

[yotot]

RMAN> list backup of controlfile;

List of Backup Sets
Key Recid Stamp LV Set Stamp Set Count Completion Time
------- ---------- ---------- -- ---------- ---------- ----------------------
1610 21 495202466 0 495201800 26 28-MAY-03

List of Backup Pieces
Key Pc# Cp# Status Completion Time Piece Name
------- --- --- ----------- ---------------------- ------------------------
1611 1 1 AVAILABLE 28-MAY-03 Backup_full_DATABASE_26_1

Controlfile Included
Ckp SCN Ckp time
---------- ---------------
3231838458144 28-MAY-03

[BV1963]

Confirm that prior to restore:

Instance is started , but database is not mounted.
You connect to the catalog database and target instance.
You backup set is accessible for the restore job.

Where is you backup stored?

[yotot]

My database is nomount and i want to restore controlfile
my backup is store in a tape.
When I connect to RMAN and my terget database I run this :

run {
allocate channel t1 type 'sbt_tape'
parms 'ENV=(NSR_SERVER=toto.com,NSR_DATA_VOLUME_POOL=Default)';
restore controlfile;
release channel t1;
}

[BV1963]

I know it sounds simplistic, but is there any way to make sure that "the tape" has "the file"?