partclone.ext4: invalid option -- 'z'

[juji]

Ubuntu 14.04 (live disk)

Run partclone: partclone.ext4 -z 10485760 -N -L /var/log/partclone.log -c -s /dev/sda2 --output - | pigz -c --fast -b 1024 -p 16 | split -b 2000m - /home/partimag/huhuhu-img/sda2.ext4-ptcl-img.gz. 2> /tmp/split_error.Dr3mQn
partclone.ext4: invalid option -- 'z'
partclone.extfs v0.2.51 http://partclone.org

The image resulted in an un-restorable image..