ORA-16516: current state is invalid for the attempted operation

admin

ORA-16516: currentstate is invalid for the attempted operation
Cause: The broker may have returned this error for eitherswitchover operations
or for database state change operations. If this error was returned for aswitchover
operation, the broker determined that either:
- The databases changing roles are shut down.
- The primary database is not shipping redo data.
- The standby database that will become the primary database is not applyingredo
data. If this error was returned for database state change operations, thedatabase
state specified was invalid.
Action: Ifthis error is returned when attempting a switchover operation, make
sure that:
- The databases changing roles are started.
- The primary database is shipping redo data.
- The standby database is applying redo data. If this error is returned when
attempting a database state change operation, make sure a valid database stateis
specified.