Solution : https://service.sap.com/sap/support/notes/332320 (SAP Service marketplace login required)
Key words : 
terms views v_ext_act v_tkebltables sxc_attr sxc_exit tkebl reason, business add-ins, downloading support packages, downloading kernel patches, r3trans support package, import table contents, buffered views, table buffer, older kernel, import problem
Related Notes : 
       
| 436288 | |
| 338842 | |
| 318846 | Installing the 4.6D kernel in 4.6A/B/C SAP systems | 
| 197803 | Composite note: Error with interface for address check | 
| 196958 | Collective note: Errors in interface for duplicate check | 
| 106764 | Synch. during transport: Overview (as of Release 4.0) | 
| 19466 | Downloading SAP kernel patches |