ORA-31631: privileges are required
Cause: The necessary privileges are not available for operations such as: restarting a job on behalf of another owner, using a device as a member of the dump file set, or ommiting a directory object associated with any of the various output files. Refer to any following error messages for additional information
Action: Select a different job to restart, try a different operation, or contact a database administrator to acquire the needed privileges
https://support.oracle.com/
http://www.oracle.com/