you have to trigger it through BADI/EXIT , using FM SAP_WAPI_START_WORKFLOW for hom you have to pass business object no , event and object key.
it will not trigger automatically through above procedure.
you have to trigger it through BADI/EXIT , using FM SAP_WAPI_START_WORKFLOW for hom you have to pass business object no , event and object key.
it will not trigger automatically through above procedure.