RMAN-03009: ORA-19504: ORA-27040 OSD-04002:

Error Creating a Control File Backup :

Starting Control File Autobackup at 28-MAR-13
released channel: c1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of Control File Autobackup command on c1 channel at 03/28/2013 23:34:12
ORA-19504: failed to create file "E:\ORABACK\VMPROD\BACKUP\BACKUPDATA\RMAN
BACKUP\SNAP_CTLFILE.CTL"
ORA-27040: file create error, unable to create file
OSD-04002: unable to open file
O/S-Error: (OS 3) The system cannot find the path specified.

Recovery Manager complete.

Workaround:

RMAN>show all; 

using target database control file instead of recovery catalog
RMAN configuration parameters for database with db_unique_name VMPROD are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F';
CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COMPRESSED BACKUPSET PARALLELISM 1;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOA
D TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'E:\oraback\VMPROD\backup\backupdata\rman
backup\snap_ctlfile.ctl'; - during a manual RMAN run these parameters were saved to RMAN configuration
CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'E:\ORABACK\VMPROD\BACKUP\BACKUPDATA\RMAN
BACKUP\SNAP_CTLFILE.CTL'; --- during a manual RMAN run these parameters were saved to RMAN configuration

RMAN> CONFIGURE SNAPSHOT CONTROLFILE NAME CLEAR; -- restores to default RMAN parameter values

old RMAN configuration parameters:
CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'E:\oraback\VMPROD\backup\backupdata\rmanbackup\snap_ctlfile.ctl';
old RMAN configuration parameters:
CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'E:\ORABACK\VMPROD\BACKUP\BACKUPDATA\RMANBACKUP\SNAP_CTLFILE.CTL';
RMAN configuration parameters are successfully reset to default value

RMAN> show all;

RMAN configuration parameters for database with db_unique_name VMPROD are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F';
CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COMPRESSED BACKUPSET PARALLELISM 1;
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOA
D TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'E:\ORACLE\ORA11GR2\DATABASE\SNCFVMPROD.O
RA'; # default

After clearing the above control file parameters from RMAN configuration, try running the RMAN backup job again.