Solution : https://service.sap.com/sap/support/notes/448633 (SAP Service marketplace login required)
Key words :
abap runtime error perform_not_found occurs, additional key words saplcjtr, respective date planning transaction, date planning transaction, project planning board, settings user-specifically, form routine save_ppt_usr_options, main program saplcjgr, program correction listed, program error
Related Notes :
| 484520 | CJ2B: Undo user settings |
| 456526 | CN22: Undo user settings in the Gantt chart |
| 371842 | Customized options, time scales, and field selection |