Not showing pop up message window when message type I and W

Question

Hi,
My requirement is to show the popup message window with material number, material description and ABC indicator of material at Every line item of PO in Transaction ME21N , if material is significant.
I find Badi to transaction me21n ME_PROCESS_PO_CUST~PROCESS_ITEM
actually i want show only information about material.
This Badi ( ME_PROCESS_PO_CUST~PROCESS_ITEM ) is properly working But does not showing Popup Message window
when i am using Message Type  'I' or "W" .
<Coding>
method IF_EX_ME_PROCESS_PO_CUST~PROCESS_ITEM.
BREAK-POINT.
BREAK-POINT.
    IF  SY-TCODE EQ 'ME21N' OR SY-TCODE EQ'ME21' . " ) AND MEPO1211-werks IS NOT INITIAL. " AND IM_LGOBE IS INITIAL.
   BREAK-POINT .
  DATA : VAR_MAKTX TYPE MAKT-MAKTX.
  DATA : VAR_MAABC TYPE MARC-MAABC.
  DATA : P TYPE STRING.
  DATA : P1 TYPE STRING.
DATA: ls_mepoitem1 TYPE mepoitem,
      ls_header_obj TYPE REF TO if_purchase_order_mm,
      ls_header   TYPE mepoheader,
      lc_werks(1) TYPE c,
      lv_fabkl    TYPE t001w-fabkl,
      lv_plifz    TYPE ekpo-plifz.
   *Get header data
  ls_header_obj = im_item->get_header( ).
  ls_header     = ls_header_obj->get_data( ).
*Get Item Data
ls_mepoitem1 = im_item->get_data( ).
    SELECT SINGLE MAABC FROM MARC INTO VAR_MAABC WHERE matnr EQ ls_mepoitem1-matnr AND werks EQ    ls_mepoitem1-WERKS.
    SELECT SINGLE MAKTX FROM MAKT INTO VAR_MAKTX WHERE matnr EQ ls_mepoitem1-matnr.
      IF   VAR_MAABC EQ 'A'.   "LS_MEPOITEM1-SPINF EQ 'A'.
        P = 'is significant material'.
        CONCATENATE  LS_MEPOITEM1-MATNR '' '(' VAR_MAKTX ')'  '' P INTO P1.
       MESSAGE p1 type 'I' .   
        EXIT.
        ENDIF.
        ENDIF.
endmethod.
guide me.....

Answer 1

Hi
Please, see SAP Note 310154 - ME21N/ME51N: Customer-specific check, generating error log
I hope this helps you
Regards
Eduardo