folowing the instructions in netcf I'm trying to run some basic interface configuration via libvirt patched with the netcf patches

I get error messages - but the interface(eth1) seem to be managed correctly - do I have an aug(what is that?) problem?

virsh # iface-define /root/libvirt_working/eth1.xml 
error: Failed to define interface from /root/libvirt_working/eth1.xml
error: internal error could not get interface XML description (netcf: unspecified error - aug_save failed)

virsh # iface-list
Name                 State      MAC Address
--------------------------------------------
eth0                 active     00:18:fe:28:7d:82
lo                   active     00:00:00:00:00:00

virsh # iface-start eth1
Interface eth1 started
virsh # iface-list 
Name                 State      MAC Address
--------------------------------------------
eth0                 active     00:18:fe:28:7d:82
eth1                 active     00:18:fe:28:7d:83
lo                   active     00:00:00:00:00:00