RMAN ACTIVE DATABASE DUPLICATE AND ORA-19505: failed to identify file "%S"

Starting backup at 02-JUN-14
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=37 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=22 device type=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 06/02/2014 02:43:47
RMAN-05501: aborting duplication of target database
RMAN-03015: error occurred in stored script Memory Script
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 06/02/2014 02:43:47
ORA-19505: failed to identify file "/u01/app/oracle/product/11.2.0.4/db1/dbs/spfileCVRMAN.ora"
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3

RMAN> **end-of-file**

Resolution:-
Check the target instance is started using spfile or  pfile. If it is running using pfile start the database using spfile. Duplicate database using active database requires the target database should be running using spfile.

$ export ORACLE_SID=CVRMAN
$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Mon Jun 2 02:49:08 2014

Copyright (c) 1982, 2013, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options

SQL> shut immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.

Total System Global Area  730714112 bytes
Fixed Size                  2256832 bytes
Variable Size             452984896 bytes
Database Buffers          272629760 bytes
Redo Buffers                2842624 bytes
Database mounted.

SQL> show parameter spfile;

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

spfile                               string      +DATA/cvrman/spfilecvrman.ora

SQL> exit

Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, Automatic Storage Management, OLAP, Data Mining

and Real Application Testing options