ORA-19505: failed to identify file - RMAN in creating standby DR database.

Question

I got this error when creating standby database at remote target server. 
ORA-19505: failed to identify file "/backup/dxp1p/online/DXP1P_CF_c-2027711285-20131204-01"
Here is what I did:
1.   started the listener and created corresponding tnsnames entry at remote standyb server 
2.  startup nomount to the standby database at remote server for an empty instance (instance name dxp1p).
3.  All rman backups are in the /backup mount point at primary and the mount point is shared on the remote server as nfs.   So, whatever have in the backup we should be able to see and read from the remote as well.
4.  Run the following at primary rman:
sql 'alter system archive log current';
backup current controlfile for standby;
sql 'alter system archive log current';
crosscheck backup;
crosscheck archivelog all;
exit
5.   Start the rman  command from primary after connected to the standby server, as the primary DB uses ASM and the standby DB uses file system for the database files:
RUN
SET NEWNAME FOR DATAFILE 1 to '/u01/dxp1p/data/system01.dbf';
SET NEWNAME FOR DATAFILE 2 to '/u01/dxp1p/data/sysaux01.dbf';
SET NEWNAME FOR DATAFILE 3 to '/u01/dxp1p/data/undotbs01.dbf';
SET NEWNAME FOR DATAFILE 4 to '/u01/dxp1p/data/users01.dbf';
SET NEWNAME FOR DATAFILE 5 to '/u01/dxp1p/data/fxtntdata.dbf';
SET NEWNAME FOR DATAFILE 6 to '/u01/dxp1p/data/fxtntindex.dbf';
SET NEWNAME FOR DATAFILE 7 to '/u01/dxp1p/data/mlogs.dbf';
SET NEWNAME FOR DATAFILE 8 to '/u01/dxp1p/data/dts.dbf';
SET NEWNAME FOR DATAFILE 9 to '/u01/dxp1p/data/dxpsoa.dbf';
SET NEWNAME FOR DATAFILE 10 to '/u01/dxp1p/data/expresso_ts.dbf';
SET NEWNAME FOR DATAFILE 11 to '/u01/dxp1p/data/jms_ts.dbf';
SET NEWNAME FOR DATAFILE 12 to '/u01/dxp1p/data/uup_ts.dbf';
SET NEWNAME FOR DATAFILE 13 to '/u01/dxp1p/data/newpage_ts.dbf';
  ALLOCATE AUXILIARY CHANNEL aux1 DEVICE TYPE DISK;
  ALLOCATE AUXILIARY CHANNEL aux2 DEVICE TYPE DISK;
  DUPLICATE TARGET DATABASE for standby
nofilenamecheck
dorecover;
========================================================================
But I got this error from the rman log:
contents of Memory Script:
   set until scn  12245784375453;
   restore clone standby controlfile;
executing Memory Script
executing command: SET until clause
Starting restore at 04-DEC-13
channel aux1: starting datafile backup set restore
channel aux1: restoring control file
channel aux1: reading from backup piece /backup/dxp1p/online/DXP1P_CF_c-2027711285-20131204-01
channel aux1: ORA-19870: error while restoring backup piece /backup/dxp1p/online/DXP1P_CF_c-2027711285-20131204-01
ORA-19505: failed to identify file "/backup/dxp1p/online/DXP1P_CF_c-2027711285-20131204-01"
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
failover to previous backup
channel aux1: starting datafile backup set restore
channel aux1: restoring control file
channel aux1: reading from backup piece /backup/dxp1p/online/DXP1P_20131204_833310136_464
channel aux1: ORA-19870: error while restoring backup piece /backup/dxp1p/online/DXP1P_20131204_833310136_464
ORA-19505: failed to identify file "/backup/dxp1p/online/DXP1P_20131204_833310136_464"
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
failover to previous backup
channel aux1: starting datafile backup set restore
channel aux1: restoring control file
channel aux1: reading from backup piece /backup/dxp1p/online/DXP1P_CF_c-2027711285-20131204-00
channel aux1: ORA-19504: failed to create file "/oracle/product/11g/dbs/u02/dxp1p/control/control02.ctl"
ORA-27040: file create error, unable to create file
Linux-x86_64 Error: 2: No such file or directory
Additional information: 1
ORA-19600: input file is control file  (/u01/dxp1p/control/control01.ctl)
ORA-19601: output file is control file  (/oracle/product/11g/dbs/u02/dxp1p/control/control02.ctl)
Finished restore at 04-DEC-13
contents of Memory Script:
   sql clone 'alter database mount standby database';
executing Memory Script
sql statement: alter database mount standby database
released channel: aux1
released channel: aux2
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 12/04/2013 19:06:13
RMAN-05501: aborting duplication of target database
RMAN-03015: error occurred in stored script Memory Script
RMAN-03009: failure of sql command on clone_default channel at 12/04/2013 19:06:13
RMAN-11003: failure during parse/execution of SQL statement: alter database mount standby database
ORA-00205: error in identifying control file, check alert log for more info
=========================================
Not sure why, can somebody help?   Appreciated!

Answer 1

I used company regular script to login to standby instance as sys user from primary DB RMAN as oracle OS user and sys DB user.   We normally run this way for years.
Like this:
$ORACLE_HOME/bin/rman target=/ auxiliary 'sys/sys0rapr321!'@dxp1p_s11 CMDFILE=${HOME}/dba/scripts/rman_cr_dr.cmd
rman_cr_dr.cmd:
RUN
SET NEWNAME FOR DATAFILE 1 to '/u01/dxp1p/data/system01.dbf';
SET NEWNAME FOR DATAFILE 2 to '/u01/dxp1p/data/sysaux01.dbf';
SET NEWNAME FOR DATAFILE 3 to '/u01/dxp1p/data/undotbs01.dbf';
SET NEWNAME FOR DATAFILE 4 to '/u01/dxp1p/data/users01.dbf';
SET NEWNAME FOR DATAFILE 5 to '/u01/dxp1p/data/fxtntdata.dbf';
SET NEWNAME FOR DATAFILE 6 to '/u01/dxp1p/data/fxtntindex.dbf';
SET NEWNAME FOR DATAFILE 7 to '/u01/dxp1p/data/mlogs.dbf';
SET NEWNAME FOR DATAFILE 8 to '/u01/dxp1p/data/dts.dbf';
SET NEWNAME FOR DATAFILE 9 to '/u01/dxp1p/data/dxpsoa.dbf';
SET NEWNAME FOR DATAFILE 10 to '/u01/dxp1p/data/expresso_ts.dbf';
SET NEWNAME FOR DATAFILE 11 to '/u01/dxp1p/data/jms_ts.dbf';
SET NEWNAME FOR DATAFILE 12 to '/u01/dxp1p/data/uup_ts.dbf';
SET NEWNAME FOR DATAFILE 13 to '/u01/dxp1p/data/newpage_ts.dbf';
  ALLOCATE AUXILIARY CHANNEL aux1 DEVICE TYPE DISK;
  ALLOCATE AUXILIARY CHANNEL aux2 DEVICE TYPE DISK;
  DUPLICATE TARGET DATABASE for standby
nofilenamecheck
dorecover;
exit
==========================
Oinstall is a group.   I am not sure to use oinstall as a user?