Hi,
I don't think it is possible to transfer a Profitability Segment (CO-PA) directly during transfer of Shipment Costs to Accounting.
The reason it that the Service Entry Sheet that gets generated would be unable to handle the CO-PA information.
If I remember well, you can only use a Cost Center or a Cost Order as costing assignment in the shipment cost document.
Therefore the correct way to do it would be indirectly, through a transfer of cost using a Cost Center (the usual way) first.
If you check the costing assignment possibilities in the shipment cost document, do you see any other possibility than Cost Center or CO Order?
Best Regards,
Franck