Oracle Solution for Error ora-00350

ORA-00350: log string of instance string (thread string) needs to be archived

What triggered the Error:

The command cannot be done because the log has not been archived, and media recovery has been enabled.

What should we do to fix it:

Archive the log or disable media recovery. If the command supports an UNARCHIVED option then it can be used. However this may result in making backups unuseable, and forcing the drop of some offline files.