[Hugo355]

Utilizas el accountgl???

La primer posición seria la de accountpayable y la segunda posición accountgl.
para el currencyamount igual serian 2 posiciones. bueno todo esto pensando que no estas calculando iva.
ejemplo:

accountpayable-itemno_acc = l_itemno. "1.
accountpayable-vendor_no = p_lifnr.
accountpayable-comp_code = c_bukrs.
accountpayable-tax_code = p_mwskz.
accountpayable-item_text = p_sgtxt.
accountpayable-alloc_nmbr = p_zuonr.
APPEND accountpayable.

CLEAR t_accountgl.
t_accountgl-itemno_acc = l_itemno."2
t_accountgl-gl_account = p_cta.
t_accountgl-item_text = t_itab-tarifa.
t_accountgl-tax_code = p_code.
append t_accountgl.

currencyamount-itemno_acc = l_itemno."1
currencyamount-currency = 'ARS'.
currencyamount-curr_type = '00'.
currencyamount-amt_doccur = 1000 * ( -1 ).
APPEND currencyamount.

currencyamount-itemno_acc = l_itemno."2
currencyamount-currency = 'ARS'.
currencyamount-curr_type = '00'.
currencyamount-amt_doccur = 1000.
APPEND currencyamount.

espero me haya explicado bien.