libvirt users - Aug 2011 - 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.