Previous DG versions needed to fall back to Maximum Performance before Switchover was allowed. This meant: shutdown primary, startup again in Maximum Performance mode, then do the switchover. You can give that approach a try. Best regards, Carel-Jan Engel === If you think education is expensive, try ignorance. (Derek Bok) === On Mon, 2005-09-05 at 09:49 -0400, Sami Seerangan wrote: > Carel, > > I am running only one instance on both Primary and Standby side. > Anything else yiu can think of? > > Thanks for your response. > > Sami > > > > On 9/5/05, Carel-Jan Engel <cjpengel.dbalert@xxxxxxxxx> wrote: > > Sami > > I guess this is still the RAC HA sandbox system you're using > for your POC? > > Did you shutdown all but one instance at both ends? During > switchover only one instance per database is allowed to run. > > >