Solution : https://service.sap.com/sap/support/notes/352064 (SAP Service marketplace login required)
Key words :
undelivered schedule lines remain unconfirmed, additional key words va02, attached source code corrections, confirmed schedule line, created item, vbap-abgru, scheduling agreement, availability check, delivery scheduling, transportation scheduling
Related Notes :
356300 | ATP: Change of shipping condition in sales order |
322985 | ATP: Change of the sales unit in the sales order |