can you pls tell me how to reslove the below mapping query?

HI Experts,

can you please tell me how to resolve the below mapping issue..

[Stop Segment (Always create X times for Pickup and Y times for Drop, where X = number of lines items with the same ShipmentID and with different AUART and Y = number of line items with the same Shipment ID, VBELN)]

source field are VBELN

Thanks

Narendra