获得SO的凭证流

RV_ORDER_FLOW_INFORMATION

       CALL FUNCTION 'RV_ORDER_FLOW_INFORMATION'
        EXPORTING
*         AUFBEREITUNG        = '2'
*         BELEGTYP            = ' '
          comwa               = it_vbco6
*         NACHFOLGER          = 'X'
*         N_STUFEN            = '50'
*         VORGAENGER          = 'X'
*         V_STUFEN            = '50'
*       IMPORTING
*         BELEGTYP_BACK       =
        TABLES
          vbfa_tab            = it_vbfa   “返回所有后续凭证
       EXCEPTIONS
         no_vbfa             = 1
         no_vbuk_found       = 2
         OTHERS              = 3