CloneZilla difficulties

Hi all, I have 2 x identical Lenovo IdeaPads each 160Gb storage. I have downloaded and burned the CD iso of Clonezilla. I set up the source with a fixed IP of 192.168.0.44 and the target with 192.168.0.55 have CloneZilla running on each machine and ran the command line as root ocs-onthefly -s 192.168.0.44 -t sda from the receiving machine. The clone failed with the line "Failed to create the partition table on the target device: /dev/sda ! Program terminated !!" I have Googled for help and tried blitzing the MBR. I could try blitzing the whole target drive, ie delete the partions already present. Would that be helpful? Thanks Andrew Greig