Hiii,

I have created Oracle 10g Primary database where control file locations are as follows:

*control_files='P:\oracle\product\10.1.0\oradata\tceng\control01.ctl','C:\oradata\tceng\control02.ct l','E:\oradata\tceng\control03.ctl'

Then I have created standby database in standby server where the control file locations are as follows:

*control_files='C:\oracle\product\10.1.0\oradata\tceng\control01.ctl','D:\oradata\tceng\control02.ct l','D:\oradata\tceng\control03.ctl'

Now if I give command 'alter system switch logfile;' no. of times in Primary server then check it in Standby by 'SELECT SEQUENCE#, FIRST_TIME, NEXT_TIME FROM V$ARCHIVED_LOG ORDER BY SEQUENCE', its showing the increasing SEQUENCE# properly.

But if I want to open the standby database by the command 'alter database open read only;' then its showing error as

SQL> alter database open read only;
alter database open read only
*
ERROR at line 1:
ORA-16004: backup database requires recovery
ORA-01157: cannot identify/lock data file 1 - see DBWR trace file
ORA-01110: data file 1: 'P:\ORACLE\PRODUCT\10.1.0\ORADATA\TCENG\SYSTEM01.DBF'

Can anyone please tell me where I have made the mistake?

Regards,

nil