r this operation. This occurs when you
   attempt to start a watch that is already running, stop a watch that is not
   running, etc.
    </dd>
    <dt> 4</dt> 

    <dd>
-- Watch is in an unknown state. This occurs if M_StopWatch does not
   recognize the state (running, stopped, etc.) that the watch is
   in. This error should not occur, and indicates an internal bug in
   M_StopWatch.
    </dd>

    <dt> 8</dt>
    <dd>
-- Invalid clock type. This occurs if <i> clock</i>
   is present and one of the spec