unless ($returncode = $self->{ftp}->rename($oldName, $newName))
    {
       $msg=$self->{ftp}->message();
       $code=$self->{ftp}->code(),
       MercMsg::RtrReportInfo(10001,"error el rename del fichero", "ftp message",$code.": ".$msg,"10005");
       return 0;
    }

##</code><code>##

Run Time Desc: 550: rename: No such file or directory.