Solution : https://service.sap.com/sap/support/notes/872180 (SAP Service marketplace login required)
Key words :
master data table, extensionin parameter table, customer-specific fields, bapi_internalorder_create function module, customer-specific enhancements, terms bapi_internalorder_create, internal orders, output length, field length, date field
Related Notes :
| 1648523 | BAPI_INTERNALORDER_CREATE CI_AUFK: Gepackte Felder |
| 992880 | BAPI_INTERNALORDER_CREATE: Transfer EXTENSIONIN fields |