Hello
Check these SAP Notes:
KBA 1823721 - RBDLSMAP problems during client copy: SUMMARY
Note 1424654 - Client copy cancels at exit RBDLSMAP
Note 1683841 - client copy kept failing at RBDLSMAP
Note 1542673 - client copy stops at RBDLSMAP
Note 1553557 - client copy hangs in RBDLSMAP..
Regards
RB