Steven Shiau - 2018-03-18

How did you run that command? In Clonezilla live command line prompt?
If so, did you mount any working dir then change to that as working dir?
E.g.,
sudo -i
mkdir /work
mount /dev/sdb1 /work
cd /work
ocs-live-dev --debian-iso clonezilla-live-20180218-bionic-amd64.iso --create-release --bg-mode text --ocs-live-batch --batch-mode --ocs-live-language en_US.UTF-8 --ocs-live-keymap NONE --extra-param '--clone-hidden-data --check-md5sum -scr --nogui --batch --postaction reboot restoredisk CLZ-TEST-8.50.0.5 sda' CLZ-TEST-8.50.0.5

Or you can use the wizard to run that:
http://clonezilla.org/show-live-doc-content.php?topic=clonezilla-live/doc/04_Create_Recovery_Clonezilla

Steven