Solution : https://service.sap.com/sap/support/notes/106830 (SAP Service marketplace login required)
Key words : 
additional key words basic dates, set indicator 'adjust basic dates', indicator 'adjust basic dates', alternative 'adjust basic dates', production finish date differ, order finish dates, production finish date, -house production time, error message vv401, order finish date
Related Notes : 
       
| 207998 | MRP: Scheduling in the planned order | 
| 46237 | Consulting: determination of the order dates |