ORA-01616

Error: ORA-01616: thread string is open - cannot disable

Causa: The thread is not closed. The last instance to use the thread died leaving the thread open. A thread cannot be disabled until it is closed. It is still required for crash or instance recovery.

Acción: If the database is open, instance recovery should close the thread soon; wait a few minutes. Otherwise open the database; crash recovery will close the thread.