Solution : https://service.sap.com/sap/support/notes/644635 (SAP Service marketplace login required)
Key words :
transaction cn21/cn22/cn23, incorrect mode 'extend', edit-> segment -> adjust, execute function 'adjust', attached program corrections, function 'adjust', terms cn21, program error, gantt chart, changed dynamically
Related Notes :
| 395224 | GANTT chart: menu option 'Send' and blank pushbutton |