[Libguestfs] error during virt-sparsify

Hello, I'm using *virt-sparsify* for compressing image file [ash2] jenkins@b-imagebuilder-worker-r13h17-prod:~/workspace/imagebuilder/packer/output$ virt-sparsify --compress /data/home/jenkins/workspace/imagebuilder/packer/output/packer-vm.qcow2 /data/home/jenkins/workspace/imagebuilder/packer/output/packer-vm.qcow2.sparsified Input disk virtual size = 41943040000 bytes (39.1G) Create overlay file in /data/tmp/ to protect source disk ... Examine source disk ... Fatal error: exception Guestfs.Error("guestfs_launch failed. This usually means the libguestfs appliance failed to start or crashed. See http://libguestfs.org/guestfs-faq.1.html#debugging-libguestfs or run 'libguestfs-test-tool' and post the *complete* output into a bug report Here is *libguestfs-test-tool* output http://pastebin.com/raw/anuu6wkh I would really appreciate any help or hint Have a nice day, Illia Svyrydov