Solution : https://service.sap.com/sap/support/notes/1262892 (SAP Service marketplace login required)
Key words : 
alias                            text                    lengthpaoc_tmc/previous_potential      vorherige potentialwert    30paoc_tmc/previous_performance    vorherige performancewert  30paoc_tmc/current_potential       aktueller potentialwert    30paoc_tmc/current_performance     aktueller performancewert  30paoc_tmc/talent_matrix          talentmatrix               30please, component component type data typegrid_descr stringpicture_descr stringstructure, component component type data typeexternal_string string, set 'cusomter text' option, apply note 1265715after applying, object type wdyv, talent review meeting, change pdf forms, correction instruction automatically, 4 forms seperatedly steps
Related Notes : 
       
| 1156407 | SAP ERP Enhan.Pk.4 SP Stack 01(11/2008) - Release Info. Note |