[Libguestfs] virt-sparsify error message.

[gilles2.lebris at laposte.net]

Hello,

I'm using virt-sparsify on a new server and I get an error message: 

# virt-sparsify img img2 
[   0.0] Create overlay file in /tmp to protect source disk 
[   0.1] Examine source disk 
virt-sparsify: error: libguestfs error: guestfs_launch failed. 
This usually means the libguestfs appliance failed to start or crashed. 

Here is libguestfs-test-tool output:
http://pastebin.com/3EZNxAeR

I would really appreciate any help or hint

Thanks in advance. 
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