DUPLICATE datafile 4 not processed because file is offline

yangbosos

同机镜像，有点小问题，但不知道怎么解决，请高手指点
源DB上做过datafile 4的删除与恢复实验，然后那时候做过全备

以后用这个全备恢复了，然后把datafile也搞好了，但是每次duplicate都报错。

RMAN>  run{
2> set newname for datafile 1 to "/db/system01.dbf";
3> set newname for datafile 2 to "/db/undotbs01.dbf";
4> set newname for datafile 3 to "/db/sysaux01.dbf";
5> set newname for datafile 4 to "/db/users01.dbf";
6> set newname for datafile 5 to "/db/ora.dbf";
7> set newname for datafile 6 to "/db/user_data.dbf";
8> DUPLICATE TARGET DATABASE TO myor
9> pfile=/opt/ora10g/product/10.2.0/db_1/dbs/initmyor.ora
10> logfile
11> '/db/redo01.log' size 10m,
12> '/db/redo02.log' size 10m,
13> '/db/redo03.log' size 10m;
14> }


RMAN> list backupset
2> ;

22      Full    524.46M    DISK        00:01:03     30-OCT-11      
        BP Key: 22   Status: AVAILABLE  Compressed: NO  Tag: TAG20111030T055025
        Piece Name: /opt/ora10g/flash_recovery_area/ORCA/backupset/2011_10_30/o1_mf_nnndf_TAG20111030T055025_7brx92gg_.bkp
  List of Datafiles in backup set 22
  File LV Type Ckp SCN    Ckp Time  Name
  ---- -- ---- ---------- --------- ----
  1       Full 591983     30-OCT-11 /opt/ora10g/oradata/orca/system01.dbf
  2       Full 591983     30-OCT-11 /opt/ora10g/oradata/orca/undotbs01.dbf
  3       Full 591983     30-OCT-11 /opt/ora10g/oradata/orca/sysaux01.dbf
  4       Full 591983     30-OCT-11 /opt/ora10g/oradata/orca/users01.dbf
  5       Full 591983     30-OCT-11 /opt/ora10g/oradata/tbs/ora.dbf
  6       Full 591983     30-OCT-11 /oracle/bb/user_data.dbf

BS Key  Type LV Size       Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
23      Full    7.36M      DISK        00:00:01     30-OCT-11      
        BP Key: 23   Status: AVAILABLE  Compressed: NO  Tag: TAG20111030T055131
        Piece Name: /opt/ora10g/flash_recovery_area/ORCA/autobackup/2011_10_30/o1_mf_s_765870691_7brxc42q_.bkp
  Control File Included: Ckp SCN: 592019       Ckp time: 30-OCT-11
  SPFILE Included: Modification time: 30-OCT-11
确定这个22是在所有datafile在线正常情况下做的最新全备

请高手指点，万分感谢