ORA-16541
member is not enabled
Cause
An attempt was made to modify or query a disabled member. This error is also returned when an attempt is made to enable, modify, or query a member that the broker has disabled because of a switchover or failover operation. The broker disables its management of a member when it detects that the database needs to be re-created because of a failover or switchover operation.
Action
If broker management of the member is disabled, re-create it if necessary, enable it and reissue the command.