Solution : https://service.sap.com/sap/support/notes/485959 (SAP Service marketplace login required)
Key words :
field selection key -> field group, relevant field selection key, receive error message ki235, additional data -> set order, relevant account assignment category, account assignment category, wbs element solution, purchase order, ki235 reason, account assignment
Related Notes :
| 633986 | FAQ: Account assignment in the service |