this I did in standby (Ours is manual recovery ) SQL> recover database using backup controlfile until cancel; ORA-00283: recovery session canceled due to errors ORA-01157: cannot identify/lock data file 75 - see DBWR trace file ORA-01111: name for data file 75 is unknown - rename to correct file ORA-01110: data file 75: '/hll01/app/oracle/product/8.1.6/dbs/UNNAMED00075' Then i did like as follows... alter database rename file '/hll01/app/oracle/product/8.1.6/dbs/UNNAMED00075' to '/hll05/oradata/hllrsnet/bev/index/bvbigcbx01.dbf' Again I tried to recover./.. SQL> recover database using backup controlfile until cancel; ORA-00283: recovery session canceled due to errors ORA-01122: database file 75 failed verification check ORA-01110: data file 75: '/hll05/oradata/hllrsnet/bev/index/bvbigcbx01.dbf' ORA-01203: wrong incarnation of this file - wrong creation SCN