       </li>
        <li>
          <b>XERRWV</b> processes a diagnostic error message.
        </li>
        <li>
          <b>XERSAV</b> records that a particular error has occurred.
        </li>
        <li>
          <b>XERSVE</b> records that an error has occurred.
        </li>
        <li>
          <b>XGETF</b> returns the error control flag.
        </li>
        <li>
          <b>XGETUA</b> reports the unit numbers of the files receiving error messages.
        </li>
        <li>
          <b>XGE