Oracle Database Discussions

Oracle 10g R2
why I encounter the following error? ORA-27302: failure occurred at: slgpn


RMAN> BACKUP AS COPY DATABASE;

Starting backup at 04-FEB-07
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile fno=00001 name=C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\SYSTEM01.DBF
output filename=C:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\ORCL\MYBKUP\MYBAK_1_ORCL_613646017_54.D
BF tag=TAG20070204T091337 recid=32 stamp=613646132
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:01:55
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channel ORA_DISK_1: starting piece 1 at 04-FEB-07
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 02/04/2007 09:18:16
ORA-19715: invalid format f for generated name
ORA-27302: failure occurred at: slgpn


RMAN> SHOW ALL;

RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 3;
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP OFF; # default
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT 'C:\oracle\product\10.2.0\flash_recovery_area\ORCL\MYBKU
P\MYbak_%f_%d_%t_%s.dbf';
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'C:\ORACLE\PRODUCT\10.2.0\DB_1\DATABASE\SNCFORCL.ORA'; # defa
ult