[libvirt-users] conflict disk error

Hi, In one of my nodes I am getting libvirt error. -- ERROR Unknown failure Traceback (most recent call last): File "/usr/sbin/virt-install", line 895, in ? main() File "/usr/sbin/virt-install", line 677, in main options.sparse, options.nodisks, guest, ishvm, conn) File "/usr/sbin/virt-install", line 239, in get_disks is_file_path), disk, size) File "/usr/sbin/virt-install", line 239, in <lambda> is_file_path), disk, size) File "/usr/sbin/virt-install", line 202, in get_disk d = cli.disk_prompt(None, kwargs) File "/usr/lib/python2.4/site-packages/virtinst/cli.py", line 277, in disk_prompt if dev.is_conflict_disk(conn) is True: File "/usr/lib/python2.4/site-packages/virtinst/VirtualDisk.py", line 890, in is_conflict_disk xml = vm.XMLDesc(0) File "/usr/lib64/python2.4/site-packages/libvirt.py", line 247, in XMLDesc if ret is None: raise libvirtError ('virDomainGetXMLDesc() failed', dom=self) libvirtError: Unknown failure -- command used: virt-install --nographics --paravirt --name dora --ram 2048 --file /dora.img --file-size 153 --location nfs://mydom:/distributions/redhat60/x86_64/ -x "ks=http://mydom/ks/redhat60-dora.ks ip=x.x.x.x netmask=255.255.255.0 dns=x.x.x.x gateway=x.x.x.x" -b xenbr0 Ideas? Thanks Paras.