[ABAP] MESSAGETAB 텍스트 가져오기 (MESSAGE_TEXT_BUILD)

 call transaction 'VA42' using bdcdata  mode  w_mode
                                    update  w_synch
                                  messages into it_mesgtab.

    loop at it_mesgtab into wa_mesgtab where msgtyp ca 'EA'.
    endloop.
    if sy-subrc <> 0.
      read table it_mesgtab into wa_mesgtab index 1.
    endif.

    call function 'MESSAGE_TEXT_BUILD'
      exporting
        msgid               = wa_mesgtab-msgid          "Messg class
        msgnr               = wa_mesgtab-msgnr          "Messg No.
        msgv1               = wa_mesgtab-msgv1
        msgv2               = wa_mesgtab-msgv2
        msgv3               = wa_mesgtab-msgv3
        msgv4               = wa_mesgtab-msgv4
      importing
        message_text_output = it_err-sapmessage.

   Append it_err.