DUPLICATE数据库到不同的机器时要将备份文件放于相同目录。

由于备份文件信息记录到控制文件当中，所以远程的备份文件应该放在与源机器相同的目录结构中或是建立符号链接来保证这一点，否则会报如下错误：

$ rman target sys/change_on_install@cpprd.sevenspace.net auxiliary sys/change_on_install@cptst.sevenspace.net

Recovery Manager: Release 9.2.0.7.0 - Production

Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.

connected to target database: CPPRD (DBID=777430827)
connected to auxiliary database: CPTST (not mounted)

RMAN> DUPLICATE TARGET DATABASE TO CPTST until time "to_date('03/02/2009 00:39','mm/dd/yyyy hh24:mi')" nofilenamecheck;

Starting Duplicate Db at 02-MAR-09
using target database controlfile instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: sid=13 devtype=DISK
allocated channel: ORA_AUX_DISK_2
channel ORA_AUX_DISK_2: sid=14 devtype=DISK

printing stored script: Memory Script
{
set until scn 8375200949668;
set newname for datafile 1 to
"/global/oracle2/oradata2/CPTST/system01.dbf";
set newname for datafile 2 to
"/global/oracle2/oradata2/CPTST/undotbs01.dbf";
set newname for datafile 3 to
"/global/oracle2/oradata2/CPTST/drsys01.dbf";
set newname for datafile 4 to
"/global/oracle2/oradata2/CPTST/tools01.dbf";
set newname for datafile 5 to
"/global/oracle2/oradata2/CPTST/users01.dbf";
set newname for datafile 6 to
"/global/oracle2/oradata2/CPTST/xdb01.dbf";
set newname for datafile 7 to
"/global/oracle2/oradata2/CPTST/am_data01.dbf";
set newname for datafile 8 to
"/global/oracle2/oradata2/CPTST/cta_data01.dbf";
set newname for datafile 9 to
"/global/oracle2/oradata2/CPTST/heartbeat_data01.dbf";
set newname for datafile 10 to
"/global/oracle2/oradata2/CPTST/cp_inventory_data01.dbf";
set newname for datafile 11 to
"/global/oracle2/oradata2/CPTST/jira_data01.dbf";
set newname for datafile 12 to
"/global/oracle2/oradata2/CPTST/mast_data01.dbf";
set newname for datafile 13 to
"/global/oracle2/oradata2/CPTST/pm_data01.dbf";
set newname for datafile 14 to
"/global/oracle2/oradata2/CPTST/services_data01.dbf";
set newname for datafile 15 to
"/global/oracle2/oradata2/CPTST/spyglass_data01.dbf";
set newname for datafile 16 to
"/global/oracle2/oradata2/CPTST/webadmin_data01.dbf";
set newname for datafile 17 to
"/global/oracle2/oradata2/CPTST/pwd_data01.dbf";
set newname for datafile 18 to
"/global/oracle2/oradata2/CPTST/account_data01.dbf";
set newname for datafile 19 to
"/global/oracle2/oradata2/CPTST/hr_data01.dbf";
set newname for datafile 20 to
"/global/oracle2/oradata2/CPTST/webadmin_data02.dbf";
set newname for datafile 21 to
"/global/oracle2/oradata2/CPTST/wiki01.dbf";
set newname for datafile 22 to
"/global/oracle2/oradata2/CPTST/smc_mv_logs01.dbf";
restore
check readonly
clone database
;
}
executing script: Memory Script

executing command: SET until clause

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

executing command: SET NEWNAME

Starting restore at 02-MAR-09

using channel ORA_AUX_DISK_1
using channel ORA_AUX_DISK_2
channel ORA_AUX_DISK_2: starting datafile backupset restore
channel ORA_AUX_DISK_2: specifying datafile(s) to restore from backup set
restoring datafile 00002 to /global/oracle2/oradata2/CPTST/undotbs01.dbf
restoring datafile 00005 to /global/oracle2/oradata2/CPTST/users01.dbf
restoring datafile 00006 to /global/oracle2/oradata2/CPTST/xdb01.dbf
restoring datafile 00007 to /global/oracle2/oradata2/CPTST/am_data01.dbf
restoring datafile 00008 to /global/oracle2/oradata2/CPTST/cta_data01.dbf
restoring datafile 00009 to /global/oracle2/oradata2/CPTST/heartbeat_data01.dbf
restoring datafile 00013 to /global/oracle2/oradata2/CPTST/pm_data01.dbf
restoring datafile 00015 to /global/oracle2/oradata2/CPTST/spyglass_data01.dbf
restoring datafile 00018 to /global/oracle2/oradata2/CPTST/account_data01.dbf
restoring datafile 00021 to /global/oracle2/oradata2/CPTST/wiki01.dbf
channel ORA_AUX_DISK_1: starting datafile backupset restore
channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /global/oracle2/oradata2/CPTST/system01.dbf
restoring datafile 00003 to /global/oracle2/oradata2/CPTST/drsys01.dbf
restoring datafile 00004 to /global/oracle2/oradata2/CPTST/tools01.dbf
restoring datafile 00010 to /global/oracle2/oradata2/CPTST/cp_inventory_data01.dbf
restoring datafile 00011 to /global/oracle2/oradata2/CPTST/jira_data01.dbf
restoring datafile 00012 to /global/oracle2/oradata2/CPTST/mast_data01.dbf
restoring datafile 00014 to /global/oracle2/oradata2/CPTST/services_data01.dbf
restoring datafile 00017 to /global/oracle2/oradata2/CPTST/pwd_data01.dbf
restoring datafile 00019 to /global/oracle2/oradata2/CPTST/hr_data01.dbf
restoring datafile 00022 to /global/oracle2/oradata2/CPTST/smc_mv_logs01.dbf
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 03/02/2009 20:50:03
RMAN-03015: error occurred in stored script Memory Script
ORA-19505: failed to identify file "/global/oracle4/ORADUMP/CPPRD/backup/CPPRD_rman_db_t5k8s60a_1_1.bak"
ORA-27037: unable to obtain file status
SVR4 Error: 2: No such file or directory
Additional information: 3

解决办法：

ln -s /global/oracle2/oradump2/CPTST/backup /global/oracle4/ORADUMP/CPPRD/backup/

问题解决！