Cancel Material Document is easy.
在SAP中物料凭证创建后，是不能删除的，如果做错了，可以冲销掉。前台事务代码是MBST。
对应的函数可以使用：MB_CANCEL_GOODS_MOVEMENT。今天我们一起来学习温故~
参数描述:
| 参数名称 | 关联类型 | 可选的 | 说明 |
| BUDAT | MKPF-BUDAT | 必选 | 凭证中的过帐日期 |
| MBLNR | MSEG-MBLNR | 可选 | 物料凭证编号 |
| MJAHR | MSEG-MJAHR | 可选 | 物料凭证的年份 |
| TCODE | SY-TCODE | 可选 | 事务码 |
| CALLED_BY | CALLED_BY | 可选 | 调用者的唯一标识 |
| VBELN | LIKP-VBELN | 可选 | 交货 |
返回导出
| 参数名称 | 关联类型 | 说明 |
| ES_MKPF | MKPF | 抬头：物料凭证 |
如下是demo代码，作为HOT583.com的码农，多年前也是SAP ABAP beginners ，最开始学习会有些难度，
到处去找Tutorial for Constant。如下是详细代码：
*定义bapi相关参数
DATA:t_mkpf TYPE mkpf OCCURS 0 WITH HEADER LINE,
t_emseg TYPE TABLE OF emseg,
t_imseg TYPE TABLE OF imseg,
t_cmseg TYPE STANDARD TABLE OF mseg,
t_mblnr TYPE mbwo_mblnr_tab,
l_budat TYPE mkpf-budat.
START-OF-SELECTION.
SELECT * FROM mkpf INTO TABLE t_mkpf
WHERE mblnr IN r_mblnr
AND mjahr = p_mjahr.
LOOP AT t_mkpf.
“ Check if original document was posted by DUV
IF t_mkpf-tcode2 <> ‘CKMDUVMAT’.
DELETE t_mkpf.
ENDIF.
“ Check if document is already reversed
SELECT SINGLE * FROM m_mbmps
WHERE smbln = t_mkpf-mblnr
AND sjahr = t_mkpf-mjahr.
IF sy-subrc = 0.
DELETE t_mkpf.
ENDIF.
ENDLOOP.
LOOP AT t_mkpf.
REFRESH: t_emseg, t_imseg.
CLEAR: s_emkpf.
IF p_budat IS INITIAL.
l_budat = t_mkpf-budat.
ELSE.
l_budat = p_budat.
ENDIF.
IF p_gi1st IS INITIAL.
“ full document reversal
CALL FUNCTION ‘MB_CANCEL_GOODS_MOVEMENT’
EXPORTING
budat = l_budat
mblnr = t_mkpf-mblnr
mjahr = t_mkpf-mjahr
tcode = ‘CKMDUVMAT’ “checked with T158 (M7066)
IMPORTING
emkpf = s_emkpf
TABLES
emseg = t_emseg
imseg = t_imseg.
LOOP AT t_cmseg INTO s_cmseg.
MOVE-CORRESPONDING s_cmseg TO s_mblnr.
IF s_cmseg-shkzg = ‘S’.
APPEND s_mblnr TO t_mblnr.
ELSE.
INSERT s_mblnr INTO t_mblnr INDEX 1.
ENDIF.
ENDLOOP.
ENDIF.
ENDLOOP.
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