Solution : https://service.sap.com/sap/support/notes/116432 (SAP Service marketplace login required)
Key words : 
tools -> administration -> administration ->      client administration -> client copy -> local copy, area      'data selection' und 'copy mode', destination named                        <sid>clnt<client>, number range counters copied, purpose choose transaction sm59, client copy    -  log, additional key words, user master record', parameter                      login/system_client, table t000    -   note
Related Notes : 
       
| 793717 | Client copy into the BW client in Netweaver/mySAP ERP | 
| 316923 | Termination of program RS_CLIENT_COPY_BW | 
| 308407 | CC-INFO: ERROR: Exit program not found | 
| 131018 | Client Copy in the BW | 
| 122679 | You may only work in client XXX. Brain 009 | 
| 116811 | Working with BW in client 000 not possible |