Recently I lost hours with this Issue, when trying to enable my Dataguard Configuration.
At Oracle Support -"Metalink" you will find some recommendations to solve this.
All recommendations leads to :
1- Set DG_BROKER_START=FALSE
2 - Delete the Dataguard Broker configuration Files
3-Recreate Configuration
That's what I did consistently, and I got several errors such as :
- Error ORA-16664
- Error ORA-16603
- Error ORA-12520
What's was missing in that recommendation is that we need to recreate the Standby.
In Prod Site
1 - Set DG_BROKER_START=FALSE in Prod
2 - Remove Dataguard Configuration Files
In STBY Site
3 - Stop and Delete all Standby datafiles
4 - Remove Dataguard Configuration Files in Standby Site
5 - Recreate Standby
And no more pb.
Hope this may help
