Solution : https://service.sap.com/sap/support/notes/443191 (SAP Service marketplace login required)
Key words :
manually add components, attached program corrections, terms resbd-matkl, resbd-matkl, program error, process order, material group, material master, table resb, iw73 reason
Related Notes :
| 408028 | Planned order conversion: Matrl group initial in reservation |