In setting up a new RMAN configuration, there's an error that I can't 
track down - the text below should hold all the needed clues, I hope.

NBU 3.2 patch 412 running on Solaris 7
Oracle/RMAN 8.0.6

Our backup class is calling an RMAN wrapper script, and here is the 
relevant bit of that shell script.  (you may safely assume that all 
the variables are properly defined previous to this code block)

----  rman_wrapper.sh  -----
su - $ORACLE_USER -c "
ORACLE_HOME=/app/oracle/product/8.0.6
export ORACLE_HOME
ORACLE_SID=test
export ORACLE_SID
${ORACLE_HOME}/bin/$RMAN TARGET $USER/$PASS@test RCVCAT 
$USER2/$PASS2@rcat806 cmdfile "$CMDFILE"
"
RETURN_STATUS=$?
----------------------------

and here are the actual RMAN commands contained in $CMDFILE:

------  rman.rcv  ----------
run {
# Hot database level 0 whole backup
allocate channel t1 type 'SBT_TAPE';
#allocate channel t2 type 'SBT_TAPE';
backup
   incremental level 0
   skip inaccessible
   tag hot_db_bk_level0
   filesperset 5
   # recommended format
   format 'bk_%s_%p_%t'
     (database);
   sql 'alter system archive log current';
   # backup all archive logs
   backup
    filesperset 20
    format 'al_%s_%p_%t'
    (archivelog all
     delete input);
}
------------------------------

and when I kick off a manual backup of this class, things start out nicely:

    1-the manual job goes active in the job monitor
    2-one user-initiated job appears
    3-the user-initiated job mounts a tape and writes 600k of data
    4-the user-initiated job finishes with an exit status of 0

but then the manual job finishes with an exit status of 1

(this test database should be more like 600MB of data, BTW)

so what is going wrong?
the interesting part of the rman output looks like this:

-----  rman_wrapper.sh.out  --------
RMAN-03022: compiling command: allocate
RMAN-03023: executing command: allocate
RMAN-08030: allocated channel: t1
RMAN-08500: channel t1: sid=9 devtype=SBT_TAPE

RMAN-03022: compiling command: backup
RMAN-03025: performing implicit partial resync of recovery catalog
RMAN-03023: executing command: partial resync
RMAN-08003: starting partial resync of recovery catalog
RMAN-08005: partial resync complete
RMAN-03023: executing command: backup
RMAN-08008: channel t1: starting datafile backupset
RMAN-08502: set_count=2 set_stamp=405165707
RMAN-08010: channel t1: including datafile 2 in backupset
RMAN-08010: channel t1: including datafile 3 in backupset
RMAN-08010: channel t1: including datafile 6 in backupset
RMAN-08010: channel t1: including datafile 7 in backupset
RMAN-08010: channel t1: including datafile 5 in backupset
RMAN-03026: error recovery releasing channel resources
RMAN-08031: released channel: t1
RMAN-00569: ================error message stack follows================
RMAN-03006: non-retryable error occurred during execution of command: backup
RMAN-07004: unhandled exception during command execution on channel t1
RMAN-10035: exception raised in RPC: ORA-19583: conversation 
terminated due to error
ORA-27016: skgfcls: sbtinfo returned error
SVR4 Error: 17469124: Unknown system error
Additional information: -12709556
ORA-06512: at "SYS.DBMS_BACKUP_RESTORE", line 408
RMAN-10031: ORA-19583 occurred during call to 
DBMS_BACKUP_RESTORE.BACKUPPIECECREATE
---------------------------------------

and the client's /usr/openv/netbackup/logs/bphdb log looks like this:

-----  bphdb log  ---------
10:44:05 [22731] <2> logparams: -sb -rdbms oracle -S kan-sol-prod3 
-to 300 -c dtsc2_test_rman -s full_test -FULL
10:44:05 [22731] <4> bphdb: INF - setenv NB_ORA_MODE=B
10:44:05 [22731] <4> bphdb: INF - NB_ORA_CLASS=dtsc2_test_rman
10:44:05 [22731] <4> bphdb: INF - NB_ORA_SCHED not defined.
10:44:05 [22731] <4> bphdb: INF - NB_ORA_PC_SCHED=full_test
10:44:05 [22731] <4> bphdb: INF - NB_ORA_SERV=kan-sol-prod3
10:44:05 [22731] <4> bphdb: INF - setenv NB_ORA_FULL=1
10:44:05 [22731] <4> bphdb: INF - setenv NB_ORA_INCR=0
10:44:05 [22731] <4> bphdb: INF - setenv NB_ORA_CINC=0
10:44:05 [22731] <4> bphdb: INF - setenv NB_ORA_USER_INITIATED=0
10:44:05 [22731] <4> bphdb: INF - setenv NB_ORA_SCHEDULED=1
10:44:05 [22731] <4> bphdb: INF - BACKUP START
10:44:05 [22731] <4> bphdb: INF - CONTINUE BACKUP message received.
10:44:05 [22731] <4> bphdb: INF - Processing 
/usr/local/openv/scripts/hot_database_backup_test.sh
10:44:05 [22731] <4> bphdb: INF - bphdb still working.
10:44:05 [22731] <4> bphdb: INF - Keepalives will be sent every 150 seconds.
10:44:05 [22731] <4> bphdb: INF - Waiting for the child status.
10:44:05 [22732] <4> bphdb: INF - Child executing 
/usr/local/openv/scripts/hot_database_backup_test.sh
10:44:34 [22731] <16> bphdb: ERR - Script exited with status = 1
10:44:34 [22731] <4> bphdb: file /tmp/obackup_class deleted.
10:44:34 [22731] <16> bphdb: ERR - bphdb exit status = 1: the 
requested operation was partially successful

10:44:34 [22731] <4> bphdb: INF - EXIT STATUS 1: the requested 
operation was partially successful
----------------------------



and it looks to me like this is an RMAN error (most likely 
configuration, as I don't claim to be an RMAN expert) but I'm not 
sure what else to look at/for.

any help out there?

TiA
rob