no receiver entered error while triggering event

Hi,

im triggering an event in my Z program by using  CL_SWF_EVT_EVENT=>RAISE which in turn triggering a workflow. Unfortunately event trace shows a message "no receiver entered". below are the screen shots for event linking, SWELS entry and my code to trigger this.

APPEND WA TO ITAB.
TRY.
CALL METHOD LO_EVENT->SET
   EXPORTING
     NAME       = 'IT_MARA'
     VALUE      = ITAB.
  CATCH CX_SWF_CNT_CONT_ACCESS_DENIED .
  CATCH CX_SWF_CNT_ELEM_ACCESS_DENIED .
  CATCH CX_SWF_CNT_ELEM_NOT_FOUND .
  CATCH CX_SWF_CNT_ELEM_TYPE_CONFLICT .
  CATCH CX_SWF_CNT_UNIT_TYPE_CONFLICT .
  CATCH CX_SWF_CNT_ELEM_DEF_INVALID .
  CATCH CX_SWF_CNT_CONTAINER .
ENDTRY.
TRY.
CALL METHOD CL_SWF_EVT_EVENT=>RAISE
   EXPORTING
     IM_OBJCATEG        = LV_OBJCAT    ""MC_OBJCATEG_BC
     IM_OBJTYPE         = 'ZCL_WF3'
     IM_EVENT           = 'START_WF'
     IM_OBJKEY          = OBJKEY
     IM_EVENT_CONTAINER = LO_EVENT
     .
  CATCH CX_SWF_EVT_INVALID_OBJTYPE .
  CATCH CX_SWF_EVT_INVALID_EVENT .
ENDTRY.
commit work.

Im on same client with my development and testing as well. could anybody please advise me on this.

Thank you