NetWorker: NMDA backup of Oracle control file failed

No change

NetWorker Server and client 8.2.1.7
NMDA 8.2
Oracle 11 G
Backup of database and archive logs are fine.
Backup of control file fail with the following error:

Starting Control File and SPFILE Autobackup at 04-FEB-16
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of Control File and SPFILE Autobackup command on ORA_SBT_TAPE_1 channel at 02/04/2016 18:39:24
ORA-19506: failed to create sequential file, name="c-3162925413-20160204-02", parms=""
ORA-27027: sbtremove2 returned error
ORA-19511: Error received from media manager layer, error text:
   RPC receive operation failed; errno = Bad file number (2:14:9)

RMAN backup script contain the following line:

CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE 'sbt_tape' TO '%F';

This also based Oracle show all command, the following listed:

CONFIGURE DEFAULT DEVICE TYPE TO 'SBT_TAPE';
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE 'SBT_TAPE' TO '%F';
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default

The same backup to disk works fine.

Index checked and started with fresh client index and same problem.
Issue observed only when "CONFIGURE CONTROLFILE AUTOBACKUP ON;"

The cause cannot be identified

In RMAN, set the AUTOBACKUP to off:

RMAN> CONFIGURE CONTROLFILE AUTOBACKUP off;

The add the following line to the RMAN script: