The Database script returned an error. Refer to the Database script output section in job logs for more details

I am facing tihis issue while backing up oracle DB, below is the rman logs.

Recovery Manager: Release 10.2.0.3.0 - Production on Tue Feb 11 19:32:06 2014

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 # -----------------------------------------------------------------
 # RMAN command section
 # -----------------------------------------------------------------
 
 RUN {
 ALLOCATE CHANNEL ch0
     TYPE 'SBT_TAPE';
 SEND 'BSA_SERVICE_HOST=172.18.1.4,NBBSA_TOTAL_STREAMS=1,NBBSA_JOB_COOKIE={9E99DCCC-24C3-481A-98EB-109B6C49967E},NBBSA_DB_DEVICE_NAME=Oracle-Win::\\lpndsopdb.leeladelhi.com\Production';
 BACKUP
     INCREMENTAL LEVEL=0
     FORMAT 'BE_U'
     DATABASE FORCE PLUS ARCHIVELOG FORCE;
 BACKUP CURRENT CONTROLFILE 
     FORMAT 'BE_U';
 
 RELEASE CHANNEL ch0;
 }
 
connected to target database: OPERA (DBID=2330952333)

using target database control file instead of recovery catalog
allocated channel: ch0
channel ch0: sid=254 devtype=SBT_TAPE
channel ch0: Symantec/BackupExec/1.1.0

sent command to channel: ch0


Starting backup at 11-FEB-14
current log archived
released channel: ch0
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup plus archivelog command at 02/11/2014 19:32:13
RMAN-06059: expected archived log not found, lost of archived log compromises recoverability
ORA-19625: error identifying file D:\ORACLE\ADMIN\OPERA\ARCHIVE\OPERAT001S297260656687469.ARC
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.

Recovery Manager complete.