Error message in ME21N and ME22N

Question

Dear Friends,
I am facing one problem... my requirement is at the time of saving purchase order i need to check some thing and if that check fails i need to display the error message and needs to stop the creation of purchase order. That error message at the status bar also ok and pop up also ok. But when i try to display that error message in one exit 'EXIT_SAPMM06E_012' then the eror message is not coming properly.. i mean it is displaying one box under that one red symbol and in the message comming my message class name. I could not able to display the proper error message in proper way.
I have tried one BADI also post save method that is displaying error message properly but immediately after that i am getting one more pop up saying system error with POST_METHOD some thing like that. I haVe checked in debugging that second error message is displaying from the standard program (message class : ME and number 816) but i dont want that second pop up. How to skip that and how to provide proper error message.
Any help will be highly appreciated.
Thanks a lot in advance,

Answer 1

Hi,
here is the sample of the code we have used in our system.
restrict logic based on Document Type and Company Code
IF i_ekko-bsart EQ c_ub AND i_ekko-bukrs EQ 'XXXX'.
loop at Line Items of PO
  LOOP AT tekpo WHERE loekz EQ space.
  if Receiving Plant is YYYY and Storage Location is NULL
    IF tekpo-werks = 'YYYY' AND
       tekpo-lgort = space.
    issue error message
      MESSAGE ID 'ZM' TYPE 'E' NUMBER '042' WITH
          tekpo-ebelp                               "line item
          tekpo-werks.                              "receiving plant
    ENDIF.          "receiving plant/storage location
  ENDLOOP.
ENDIF.          "document type
Hope this helps.
-Ramesh