Check FM issues 4.6c

[Sample, Rick]

I need to start a WF for events bus2012.RELEASESTEPCREATED or
bus2012.CHANGED.

I am having a problem because both events trigger at the same time. 
So a simple check to see if a WF already is running is not working. 

I know there is a solution, but it is eluding me at the moment...

Basic code:
...
    WHEN 'RELEASESTEPCREATED' or 'CHANGED'.

      SELECT a~wi_id b~wi_stat INTO TABLE t_wi_id
         FROM sww_contob AS a INNER JOIN swwwihead AS b
         ON a~wi_id = b~wi_id
         WHERE a~objtype    = l_obj
         AND   a~objkey     = l_doc
         AND   b~wi_rh_task = 'WS99999999'.
      LOOP AT t_wi_id.
        CASE t_wi_id-status.
          WHEN 'WAITING'.
            RAISE workflow_off.
            EXIT.
          WHEN 'READY'.
            RAISE workflow_off.
            EXIT.
          WHEN 'SELECTED'.
            RAISE workflow_off.
            EXIT.
          WHEN 'STARTED'.
            RAISE workflow_off.
            EXIT.
          WHEN OTHERS.
        ENDCASE.
      ENDLOOP.
...