Solution : https://service.sap.com/sap/support/notes/202792 (SAP Service marketplace login required)
Key words : 
additional key words v_t399x_40, symptom activating table t399x, solution change table t399x, field t399x-pruefart, select field pruefart, choose 'goto/ search, parameter kurztext change, change view v_t399x_40, table t399x, customer change
Related Notes : 
       
| 390062 | Additional information about upgrading to 4.6C SR2 | 
| 327285 | Additions to upgrade to 4.6C SR1 |