ME51N User Exit

Question

Hi all,
I need to create a user exit that allows me to create a purchase requisition (ME51N) just for some materials differentiated by type of material, account assignment category and/or plant.
Please help. Thank you very much.

Answer 1

Hi,
You cannot create user exit since user exits are enhancements provided by SAP. You can only insert your own code in the zincludes attached with the exits. Now use the following program to find an exit for a transaction.
This info would definitely help you, reward points if so.
* REPORT YSMOD2
* SELECTION TEXTS : INPUT1 ----> Enter search term for Trxn.
*                   INPUT2 ----> Enter type of exit
REPORT YSMOD2 .
TABLES: MODSAP, MODACT, TSTC.
PARAMETERS: INPUT1 LIKE TSTC-TCODE DEFAULT ' ',
            INPUT2 LIKE MODSAP-TYP DEFAULT ' '.
DATA: SEARCH1(6),
      SEARCH2(3),
      SEARCH3 LIKE MODSAP-MEMBER.
DATA : FIRST_ROW VALUE 'Y'.
CONCATENATE: '%' INPUT1 '%' INTO SEARCH1,
             '%' INPUT2     INTO SEARCH2.
SELECT * FROM TSTC WHERE TCODE LIKE SEARCH1.
  FIRST_ROW = 'Y'.
  CHECK TSTC-PGMNA NE SPACE.
  CONCATENATE '%' TSTC-PGMNA '%' INTO SEARCH3.
  SELECT * FROM MODSAP WHERE TYP LIKE SEARCH2
                       AND MEMBER LIKE SEARCH3.
    SELECT SINGLE * FROM MODACT WHERE MEMBER = MODSAP-NAME.
    IF FIRST_ROW EQ 'Y'.
      WRITE: /0 TSTC-TCODE, 6 TSTC-PGMNA, 16 MODSAP-NAME, 32 MODSAP-TYP,
                                       45 MODSAP-MEMBER, 70 MODACT-NAME.
      FIRST_ROW = 'N'.
    ELSE.
WRITE: /16 MODSAP-NAME, 32 MODSAP-TYP, 45 MODSAP-MEMBER, 70 MODACT-NAME.
    ENDIF.
    CLEAR : MODSAP, MODACT.
  ENDSELECT.
  IF SY-SUBRC NE 0.
    WRITE : /0 TSTC-TCODE, 6 TSTC-PGMNA, 30 'No exits found'.
  ENDIF.
  CLEAR TSTC.
ENDSELECT.
END-OF-SELECTION.
  CLEAR: SEARCH1, SEARCH2, SEARCH3.
Regards