Two Instance getting triggered on Change of PO for BUS2012

Question

Hello experts,
I have created a single step Workflow, to be triggered on change of PO.
I created a Subtype of BUS2012 and delegated it. added a new method to carry out the processing as required.
However on change there are two workflow instance in the SWIA, one completed and the other in Error state.
on examining the SWEL, for a change to PO, there are three entries for Change event.
1. BUS2012 - Changed event - No receiver entered
2. BUS2012 - Changed event - receiver found (My task)
3. FREBUS2012 - Changed event - receiver found ( My Task).
4. FREBUS2012 - event is CHANGEFRE - NO receiver entered.
I have created just one link in SWE2, however I am not able to figure it out why FREBUS2012 is getting a receiver.
Please help.
Regards,
Jibran

Answer 1

Hi Jibran
Check the delegations, there surely would be a delegation between BUS2012 and FREBUS2012 in SWO1.
I am not sure of why this happens, maybe some config related to funct settings. I faced this once and I resolved it via a check function module between BUS2012 and event CHANGED in SWE2.
This is what i Wrote in the check function module:
* Check if the CHANGED Event is triggered
  IF event = lvc_changed_event. " 'CHANGED'
    SORT event_container BY element value.
*   Read the container value to get actual Object Type
    READ TABLE event_container INTO     ls_container
                               WITH KEY element = '_EVT_OBJTYPE'
                                        value   = 'FREBUS2012' "Check for FREBUS2012 Object Type
                               BINARY SEARCH.
*   Raise an exception if the CHANGED event is from FREBUS2012
    IF sy-subrc = 0.
      RAISE frebus2012_changed_triggered.
    ENDIF.
  ENDIF.
So this will not let your WF start with FREBUS2012 CHANGED...... if you look for OBJTYPE in the check FM, it will still contain BUS2012....real object type is hidden in _EVT_OBJTYPE.
Regards,
Modak