[libvirt-users] unknown driver format value 'qcow3'

Hi All I am trying to deploy VMs using libvirt and a domainXML file where i mention the parameters for the VM to be deployed. I am using libvirt version: libvirt 0.10.2 ********** virsh # version Compiled against library: libvirt 0.10.2 Using library: libvirt 0.10.2 Using API: QEMU 0.10.2 Running hypervisor: QEMU 0.12.1 *********** I get this libvirt exception while deploying a VM. Exception trace ************** 2015-04-14 18:06:28,240 [pool-1-thread-45] ERROR defineDomain(SimpleAppliance.java:581) - Failed to define domain/VM from XML org.libvirt.LibvirtException: unsupported configuration: unknown driver format value 'qcow3' at org.libvirt.ErrorHandler.processError(Unknown Source) at org.libvirt.Connect.processError(Unknown Source) at org.libvirt.Connect.processError(Unknown Source) at org.libvirt.Connect.domainDefineXML(Unknown Source) ******************************** Do i need to upgrade to any specific version of libvirt ? or change any file to make this work ? Thanks Jatin