Capture PO errors to log table

Question

Please let me know if there is a way to capture SAP standard errors raised during PO creation into a Z log table.
EX: SAP raises Message 06, message number 882, is there a way to capture this error into a log table.
Thanks for your help.

Answer 1

In PO processing using ME21N/ME22N a lot messages are not issued individually, but are presented in a list in a pop-up window.  Not sure if this is true of the messages you want to capture.
If you look at the following code implemented in the CHECK method of "ME_PROCESS_PO_CUST" BADI, you will see it adds a customer message to this list using the macro MMPUR_MESSAGE from the MM_MESSAGES_MAC include.
Perhaps there is also a macro for reading the messages. 
Even if not, the macro code should show how you could read them and then you could place code in this user exit to get the messages and log the relevent ones to a Z table
[code]
METHOD if_ex_me_process_po_cust~check.
NB: Add Type Group MMMFD to implementing class properties tab
DATA: lt_items TYPE purchase_order_items,
l_item_wa TYPE purchase_order_item,
l_item TYPE mepoitem,
l_total TYPE brtwr,
l_matkl TYPE matkl,
l_flag TYPE c.
INCLUDE mm_messages_mac. "useful macros for message handling
CLEAR: l_total, l_flag.
CALL METHOD im_header->get_items
RECEIVING
re_items = lt_items.
Loop through items and calculate total
LOOP AT lt_items INTO l_item_wa.
CALL METHOD l_item_wa-item->get_data
RECEIVING
re_data = l_item.
l_matkl = l_item-matkl.
l_total = l_total + l_item-brtwr.
Check if any lines missing contract number
IF l_item-konnr IS INITIAL.
l_flag = 'X'.
ENDIF.
ENDLOOP.
IF l_flag = 'X'.
IF l_total > 5000.
mmpur_metafield mmmfd_agreement.
mmpur_message 'E' '06' '999'
'Purchase order over $5000.00 requires a contract' '' '' ''.
invalidate the object
CALL METHOD im_header->invalidate( ).
LOOP AT lt_items INTO l_item_wa.
CALL METHOD l_item_wa-item->invalidate( ).
ENDLOOP.
ENDIF.
ENDIF.
ENDMETHOD.
[/code]
Hope this is of some use.
Andrew