Creating Purchase Order lines in Oracle E-Business Suite R12 isn’t done with a single API call—you must use the Purchasing Documents Open Interface (PDOI). This tutorial walks you through the complete process: populating interface tables, linking headers, lines, shipments, and distributions, running the Import Standard Purchase Orders program (POXPOPDOI), and troubleshooting errors. With a full PL/SQL example and best practices, you’ll learn the supported, upgrade-safe way to automate PO line creation in Oracle R12.