Solution : https://service.sap.com/sap/support/notes/1144151 (SAP Service marketplace login required)
Key words : 
stock transfer orders, schedule line processing, relevant correction instruction, run transaction vl10hu, terms vl10hu, create deliveries, open quantity, sto reason, caused due, program error
Related Notes : 
       
| 969152 | Missing schedule lines in VL10I. |