Solution : https://service.sap.com/sap/support/notes/832307 (SAP Service marketplace login required)
Key words :
'freely assigned function keys' box, ctrl-f12 enter /cab/lp, enter function code /cab/lp, newly added function code, prerequisites program error solution, click display<->change button, press 'function code' button, display object list button, add length plan button, function code ltxr
Related Notes :
| 800155 | Composite SAP note for Cable Solution - V46C.1A Fix Pack 6 |