For the F-47 posting, it only post to 1 line item whereby BAPI "BAPI_ACC_DOCUMENT_POST" have to post in 2 lines for balance the account. Here are the steps to do posting F-47 (Down Payment Request) via BAPI and BTE with 1 line item:
1) Create a new function group using transaction code SE80.
2) Copy the standard function module of BTE "SAMPLE_INTERFACE_RWBAPI01" to a Z Function module, say "ZSAMPLE_INTERFACE_RWBAPI01"
3) Goto transaction code FIBF to create the BTE for process "RWBAPI01".
Refer the link at Configuration session - Business Transaction Event - RWBAPI01 - For Accounting Document Interface - ABAP Development - SCN W...
4) Before call the BAPI "BAPI_ACC_DOCUMENT_POST", prepare the table for extension1 as below:
DEFINE mac_assign_extension.
clear lv_string.
concatenate &1 &2
into lv_string.
concatenate &3 lv_string
into &3
separated by ';'.
END-OF-DEFINITION.
*-> prepare extension
CONCATENATE '0001' ls_accountpayable-itemno_acc
INTO ls_extension1-field1. " 0001 => running number for different purpose to triggering BTE "RWBAPI01"
CONCATENATE 'BSTAT' 'S' INTO ls_extension1-field2.
mac_assign_extension 'BSCHL' '39' ls_extension1-field2.
mac_assign_extension 'UMSKZ' 'F' ls_extension1-field2.
mac_assign_extension 'ZUMSK' 'Z' ls_extension1-field2.
mac_assign_extension 'SHKZG' 'H' ls_extension1-field2.
APPEND ls_extension1 TO lt_extension1.
5) In the function module "ZSAMPLE_INTERFACE_RWBAPI01", read the table extension1 and populate the field into table IT_ACCIT.
TYPES : BEGIN OF ty_extension,
field TYPE char50,
END OF ty_extension.
TYPES : tty_extension TYPE STANDARD TABLE OF ty_extension.
DATA : ls_extension TYPE bapiacextc,
ws_extension TYPE ty_extension,
lt_extension TYPE tty_extension,
lv_tabix TYPE sytabix,
lv_len TYPE i.
DATA : lv_bstat TYPE char01,
lv_bschl TYPE char01,
lv_umskz TYPE char01,
lv_zumsk TYPE char01,
lv_shkzg TYPE char01.
DEFINE mac_assign_value.
clear lv_len.
if &4 is initial.
find first occurrence of &1 in &2 match length lv_len.
if sy-subrc = 0.
&3 = &2+lv_len.
&4 = 'X'.
endif.
endif.
END-OF-DEFINITION.
LOOP AT extension INTO ls_extension.
CASE ls_extension-field1(4).
WHEN '0001'. "For down payment request
MOVE 'RFST' TO document_header-glvor.
READ TABLE it_accit WITH KEY posnr = ls_extension-field1+4(10).
IF sy-subrc = 0.
lv_tabix = sy-tabix.
SPLIT ls_extension-field2 AT ';'
INTO TABLE lt_extension
IN CHARACTER MODE.
LOOP AT lt_extension INTO ws_extension.
mac_assign_value 'BSTAT' ws_extension-field it_accit-bstat lv_bstat.
mac_assign_value 'BSCHL' ws_extension-field it_accit-bschl lv_bschl.
mac_assign_value 'UMSKZ' ws_extension-field it_accit-umskz lv_umskz.
mac_assign_value 'ZUMSK' ws_extension-field it_accit-zumsk lv_zumsk.
mac_assign_value 'SHKZG' ws_extension-field it_accit-shkzg lv_shkzg.
ENDLOOP.
MODIFY it_accit INDEX lv_tabix.
ENDIF.
WHEN OTHERS.
ENDCASE.
ENDLOOP.
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Another option to post noted items using BADI: F-47 Downpayment Request Using BAPI_ACC_DOCUMENT_POST
