MBST冲销采购订单收货凭证BAPI函数的使用
此函数对应的PO订单仅是采购合同的收货物料凭证的冲销，未涉及会计凭证与发票凭证，涉及会计凭证与发票凭证的情况在冲销前需要对凭证进行检查，后续会进行相关内容的补充。
以下是一个PEFORM 例子，仅供参考：
FORM frm_good_cancle USING p_mblnr TYPE mblnr
new_mblnr TYPE mblnr
u_date TYPE sy-datum.
DATA: li_goodsmvt_headret TYPE bapi2017_gm_head_ret,
li_goodsmvt_matdocitem TYPE TABLE OF bapi2017_gm_item_04 WITH HEADER LINE.
DATA: i_return TYPE TABLE OF bapiret2 WITH HEADER LINE.
CALL FUNCTION 'BAPI_GOODSMVT_CANCEL'
EXPORTING
materialdocument = p_mblnr "物料凭证
matdocumentyear = u_date(4) "年
goodsmvt_pstng_date = u_date
goodsmvt_pr_uname = sy-uname
IMPORTING
goodsmvt_headret = li_goodsmvt_headret
TABLES
return = i_return
goodsmvt_matdocitem = li_goodsmvt_matdocitem.
new_mblnr = li_goodsmvt_headret-mat_doc. "新生成的凭证
LOOP AT i_return WHERE type = ‘e’.
ENDLOOP.
IF sy-subrc = 0.
ENDIF.
ENDFORM.
