ORA-19511 when backup with rman (using NetBackup Media Manager)

Question

Hello forum
I added new database hosts to NetBackup, tried to test backup of the first instance on one host, below is what I get - Do you know cause and solution? Backup from NetBackup master server can be performed without problems. Below you will find the output from sbttest too.
Thanks Casi
---------- rman log -----------
Recovery Manager: Release 10.2.0.3.0 - Production on Fri Mar 7 10:26:28 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: IARTS (DBID=2414804385)
connected to recovery catalog database
RMAN> run
2> {
3> allocate channel c1 DEVICE TYPE sbt PARMS='ENV=(NB_ORA_SERV=sksta00500.ksta.zh.ch,NB_ORA_CLASS=LX_ORA_ONL)';
4> backup current controlfile;
5> }
allocated channel: c1
channel c1: sid=110 instance=IARTS1 devtype=SBT_TAPE
channel c1: VERITAS NetBackup for Oracle - Release 5.1 (2004122520)
Starting backup at 07-MAR-08
channel c1: starting full datafile backupset
channel c1: specifying datafile(s) in backupset
including current control file in backupset
channel c1: starting piece 1 at 07-MAR-08
released channel: c1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on c1 channel at 03/07/2008 10:27:11
ORA-19506: failed to create sequential file, name="19jalk7t_1_1", parms=""
ORA-27028: skgfqcre: sbtbackup returned error
ORA-19511: Error received from media manager layer, error text:
VxBSAValidateFeatureId: Failed with error:
Server Status: file open failed
RMAN>
---- sbttest ---------------------------
$ORACLE_HOME/bin/sbttest /tmp/x.lst
The sbt function pointers are loaded from libobk.so library.
-- sbtinit succeeded
-- sbtinit (2nd time) succeeded
sbtinit: Media manager supports SBT API version 2.0
sbtinit: Media manager is version 5.0.0.0
sbtinit: vendor description string=VERITAS NetBackup for Oracle - Release 5.1 (2004122520)
sbtinit: allocated sbt context area of 8 bytes
sbtinit: proxy copy is supported
-- sbtinit2 succeeded
-- regular_backup_restore starts ................................
-- sbtbackup succeeded
Segmentation fault

Answer 1

Are you sure, you installed the proper media management software? Check it:
(1) cd to your $ORACLE_HOME/bin directory
(2) Type sbttest test
The sbttest is a standalone program which test to see if the MML(Media
Management Layer) software is installed and can accept a data stream and return
an identical data stream.
sbttest will return 0 which indicates success or 1 which indicates an error has
occurred. An error means it's not an Oracle problem.