[libvirt-users] domain has active block job

[Fiorenza Meini]

Hi there,
I receive this error when I run nova image-create <VM name> <Vm Sanpshot 
name>:

Exception during message handling: block copy still active: domain has 
active block job

In libvirt log file I can see:
error : qemuDomainDefineXML:6312 : block copy still active: domain has 
active block job

Libvirt is 1.2.7 version, linux system is Debian Wheezy

Please, what does it mean ?

Regards
Fiorenza

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