Holding a PO in ME21

Question

Hi!
Please look at the following business scenario.
A PO is created using the transaction ME21. Now if a particular check fails for any item in the purchase order, I am supposed to put the PO on hold status/ block it somehow and update a custom table with the held PO number.
Now here is my issue.
After hunting around for quite a bit, I found out that  in ME21N the PO can be held using the check method of the badi ME_PROCESS_CUST by setting the ch_failed flag. However, I am supposed to use ME21 transaction and not the enjoy transaction, as it is a third party order. In case of ME21 this badi will not be triggered at all. I have looked around for quite some time and I am not able to find it.
Can someone tell me of any user exit/ badi/ form exit for me to achieve the same? Please not that a PO number must be generated and I should not simply throw an error message to the user.

Answer 1

Hi,
Try this code..I have used memory pointers....
In the userexit EXIT_SAPMM06E_012
DATA lwa_ekpo LIKE bekpo.
data lw_field(50).
FIELD-SYMBOLS <t_xekpo> TYPE STANDARD TABLE.
IF sy-tcode = 'ME21'.
  lw_field = '(SAPLMEPO)POT[]'.
  ASSIGN (lw_field) TO <t_xekpo>.
  if sy-subrc ne 0.
    lw_field = '(SAPMM06E)POT[]'.
    ASSIGN (lw_field) TO <t_xekpo>.
   if sy-subrc <> 0.
     message e208(00) 'Couldn't find POT'.
   endif.
  endif.
  loop at <t_xekpo> into lwa_ekpo.
Check the conditions..
example..
<b>    if lwa_ekpo-menge > '100.000'.
Block the PO line item..
      lwa_ekpo-loekz = 'S'.
      MODIFY <t_xekpo> from lwa_ekpo transporting loekz.
    endif.</b>
  endloop.
ENDIF.
Hope this helps..
Thanks,
Naren