Solution : https://service.sap.com/sap/support/notes/141465 (SAP Service marketplace login required)
Key words : 
usual <host>_<sid>_<instanz> naming convention, /usr/sap/<sid>/sys/exe/run directory, component specification 'bc-dwb-dic-ac', bc-dwb-dic-ac component, component bc-dwb-dic-ac, component 'bc-dwb-dic-ac', execute 'control -> data transfer -> optimize' occasionally, data transfer process automatically stops running, executing 'control -> data transfer -> stop', case immediately contact development support
Related Notes : 
       
| 358385 | Missing change documents after upgrade | 
| 336496 | Incremental conversion of cluster tables | 
| 325130 | Conversion of Tables EDIDOC & CDCLS, Rel. 4.6C/D | 
| 173330 | Conversion of tables EDIDOC & CDCLS Release 4.6 | 
| 172098 | ICNV and upgrade concatenation 4.0B -> 4.5B/4.6B/4.6C | 
| 117668 | Additional info: Upgrading to 4.5B | 
| 108328 | DBIF_RSQL_NO_MEMORY during access to cluster table | 
| 106412 | Conversion of tables EDIDOC & CDCLS, Release 4.0B | 
| 89384 | Checking cluster tables with R3check | 
| 19466 | Downloading SAP kernel patches |