Solution : https://service.sap.com/sap/support/notes/142305 (SAP Service marketplace login required)
Key words :
path 'control data > process-related', periodic field groups wogxxx, periodic field group wtgxxx, additional key words ewu, form routine 'convert_coss_tw' read, select line 'cosp 03 3 convert_cosp_tw', display incorrect planned values, process-related control', --------------provided entries exist, dialog box enter
Related Notes :
| 214385 | EWUGENEW/EWCGENEW: TABLE_INVALID_INDEX |
| 121626 | Euro LC changeover:important Support Packages info. |