Solution : https://service.sap.com/sap/support/notes/1471323 (SAP Service marketplace login required)
Key words :
standard note 1470588to, batch split items, serial number managed, serial number, serial numbers, message 'lava', create idocs, outbound deliveries, inbound deliveries, outbound delivery
Related Notes :
| 1470588 | Serial numbers missing after inbound deliv. created via IDOC |