Parts were ordered to support work on a task order. The parts had a long lead time and arrived several weeks after the task order PoP ended. DCAA is denying the payment of the invoice as the parts were not received within the task order PoP. We have always operated (not that it makes it right...), without question, that as long as the PO was cut prior to the task order PoP end date we were OK with the costs counting for that task order. Now we have DCAA denying two invoices. Anyone else have experience with this issue?