Solution : https://service.sap.com/sap/support/notes/414861 (SAP Service marketplace login required)
Key words : 
ff08/09/10/11  mcfkennz                        fv06/07/08transport info system, vadd          mcvkennz1         mcvkusrpurchasing info system, mcekkz             mcekusrshop floor info system, errors bcd_field_overflow compute_bcd_overflow collect_overflow_type_p collect_overflow_type, structure user includesales info system, extend existing reference structures, bcd_field_overflow compute_bcd_overflow convt_overflow oracle 1438, prerequisites incorrect customizing, output characteristic '+/- sign', info structure remove
Related Notes : 
       
| 528336 | LIS: Addition of extended check | 
| 204130 | SIS update: Collective note | 
| 174141 | SIS: Collective note - Customizing | 
| 62182 | SIS: ORACLE error 1438 when saving deliveries | 
| 16897 | SIS: Problems with key figure "workload" (S005) |