thanks. i used APPEND and it worked fine.
warea-HH = '1'.
warea-ITEMCODE = '1'.
warea-ITEMNAME1 = 'test1'.
warea-ITEMNAME2 = 'test2'.
warea-QTY = '1'.
warea-PRICE = '100'.
warea-AMT = '100'.
warea-TAX = '15'.
warea-TAXR = '15'.
APPEND warea TO INPUT-INVOICE-INVOICES-RECORD-ITEMS-ITEM.
Regards,
