While doing switchover in physical standby database which is operating in Maximum Availability mode, I got into this error. I do have standby logfiles. SQL> select switchover_status from v$database; SWITCHOVER_STATUS ------------------ SESSIONS ACTIVE SQL> alter database commit to switchover to primary with session shutdown; alter database commit to switchover to primary with session shutdown * ERROR at line 1: ORA-16139: media recovery required SQL> recover standby database; ORA-00279: change 318016 generated at 09/04/2005 13:57:41 needed for thread 1 ORA-00289: suggestion : /u07/oradata/dgtest/0001S0000000056.ARC ORA-00280: change 318016 for thread 1 is in sequence #56 Specify log: {<RET>=suggested | filename | AUTO | CANCEL} AUTO ORA-00279: change 318016 generated at 09/03/2005 21:06:49 needed for thread 2 ORA-00289: suggestion : /u07/oradata/dgtest/0002S0000000009.ARC ORA-00280: change 318016 for thread 2 is in sequence #9 ORA-00328: archived log ends at change 317689, need later change 318016 ORA-00334: archived log: '/u07/oradata/dgtest/0002S0000000009.ARC' Thanks Sami