Pick Away rule not working for Destination locator segment1 when use expression

Hi ,

we have created Pick Away rule for sale order when pick confirmed done the destination sub inventory should be = ABC and Locator segment1 should be Sale order Customer PO.

Can this achieve by Expression and putting into Locator segment 1.

Insert below query in the Expression == And i have enabled it.

select ooha.cust_po_number from oe_order_headers_all ooha ,oe_order_lines_all oola

where ooha.header_id = oola.header_id;