Sets maximum tolerance level for errors:

    o  ERROR - FTP tolerates errors and warnings and does not exit
       when running in batch mode.

    o  SUCCESS - The default. FTP does not tolerate errors and exits
       when running in batch mode.

    o  WARNING - FTP tolerates warnings and does not exit when
       running in batch mode.

    DCL Format

      SET ERROR_LEVEL  error_level

    UNIX Format

      There is no UNIX equivalent for the SET ERROR_LEVEL command.