I am trying to compress a windows 10VM on Eve-ng with the 'virt-sparsify'. 

Initial Command Run:  virt-sparsify  --compress virtioa.qcow2 compressedvirtioa.qcow2

Added debugging and ran again with '-v -x' parameters to get output. 

Please see the attached file. 

apt list --installed | grep libguest

libguestfs-perl/focal,now 1:1.40.2-7ubuntu5 amd64 [installed,automatic]
libguestfs-tools/focal,now 1:1.40.2-7ubuntu5 amd64 [installed,automatic]
libguestfs0/focal,now 1:1.40.2-7ubuntu5 amd64 [installed,automatic]

Thank you,

Jaime Rodriguez