Solution : https://service.sap.com/sap/support/notes/97344 (SAP Service marketplace login required)
Key words :
additional key words co01, enter message class c7, enter table t100, lower-level orders, 'framework finish date, 'framework start date, collective order scheduling, collective order, 'maintain' key, 'change' key
Related Notes :
| 160598 | Collctive ord. scheduling'Only capcity requirmts' |
| 124107 | Incorrect dates in the collective order |