Solution : https://service.sap.com/sap/support/notes/496555 (SAP Service marketplace login required)
Key words :
contract item category, open reference quantity, vbap-orfmng reason, schedule line category, item category, open quantity, schedule line, vbap-erlre, vbep-orfmng, sales order
Related Notes :
| 508230 | Schedule lines without open refernce quantity are transferrd |