Solution : https://service.sap.com/sap/support/notes/393308 (SAP Service marketplace login required)
Key words : 
additional key words rsumod10, successfully activated table tlanimp, activating table tlanimp, start transaction se14, select table tlanimp, abap-oo class, program cl_cts_language===============cp, table tlanimp, mentioned class, cl_cts_language===============cp
Related Notes : 
       
| 435140 | Additional information on upgrading to Basis 4.6D (APO 3.1x | 
| 335029 | Additions to the upgrade to Basis 4.6D (NDI Upgrade) |