Change Container from inside object method

[Mike Mathieson]

I'm trying to pass a container element from an object method into my
workflow task with no success.  I know I've done this before but for some
reason it won't work this time.   My event is getting created, but the
container element 'CostCenter' is not being changed.  Can anyone make a
suggestion of something I should check?
 
  DATA: w_objkey LIKE sweinstcou-objkey,
        w_swcont LIKE swcont OCCURS 10.
 
  w_objkey(4)    = vbkpf-bukrs.
  w_objkey+4(10) = vbkpf-belnr.
  w_objkey+14(4) = vbkpf-gjahr.
 
  swc_create_container w_swcont.
  swc_set_element      w_swcont  'CostCenter'  bseg-kostl.
 
  CALL FUNCTION 'SWE_EVENT_CREATE'
       EXPORTING
            objtype           = 'ZPARKINV'
            objkey            = w_objkey
            event             = event
       TABLES
            event_container   = w_swcont
       EXCEPTIONS
            objtype_not_found = 1
            OTHERS            = 2.
 
  IF sy-subrc = 0.
    COMMIT WORK.
  ENDIF.
 
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