Solution : https://service.sap.com/sap/support/notes/156495 (SAP Service marketplace login required)
Key words :
shown additional key words cj27, system generates error message cj572, 'include subnetwork' milestone function, milestone maintained correctly, project planning board, system status, program error, status change, user status, standard network
Related Notes :
| 146924 | Include subnetwork by milestone function |
| 102676 | Termin.when creating subnetwork and external number |