Hello, We are running xen3.4.3 on rhel5.4 and trying to build the new libvirt 0.8.3 and the xencaptest is failing. It seems to be failing because it is passing NULL in as the virtconn and it ends up going into the following code section in function xenHypervisorBuildCapabilities:   if (sys_interface_version >= SYS_IFACE_MIN_VERS_NUMA) {        if (xenDaemonNodeGetTopology(conn, caps) != 0) {            virCapabilitiesFree(caps);            return NULL;        }    } And that throws an error because conn is empty.  I don't see how that could ever work with the virtconn NULL.  If I force it to be lower version number then it passes fine.  I think its figuring we are sys_interface_version=6. Any ideas? Thanks, Tom