Solution : https://service.sap.com/sap/support/notes/452484 (SAP Service marketplace login required)
Key words :
additional key words order type maintenance, 'functional area' field, order type, functional area, order types, order category 02, accrual order, order category 01, transaction kot2, accrual orders
Related Notes :
| 511923 | Order type:Functional area does not exist |
| 420281 | Internal order: planning & object class |