[Xen-users] Problemi using vif-route script

[Giorgio Mossa <mossa@xxxxxxxxxxxxxxxxxxxx>]

Hello everyone,
I'm running Xen 4.2 on a Ubuntu 12.04 and I'm trying 
to run a paravirtualized machine using vif-route script
but while trying to bringing up the virtual machine I get
the following error message:

 Parsing config from virtual_machine
 libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus: 
/etc/xen/scripts/vif-route online [9649] exited with error status 1
 libxl: error: libxl_device.c:978:device_hotplug_child_death_cb: script: 
/etc/xen/scripts/vif-route failed; error detected.
 libxl: error: libxl_create.c:1096:domcreate_attach_pci: unable to add nic 
devices
 libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus: 
/etc/xen/scripts/vif-route offline [9712] exited with error status 1
 libxl: error: libxl_device.c:978:device_hotplug_child_death_cb: script: 
/etc/xen/scripts/vif-route failed; error detected.

Could anyone guess what caused this error and how to fix it?

p.s.: Here the configuration of file "virtual_machine"

 name = "Name"
 builder = "generic"
 memory = 500
 disk = ["format=raw,vdev=xvda1,backendtype=tap,target=/home/xen/disco.img"] 
 vif = ["script=vif-route"]
 
 kernel = "/home/xen/kernel/vmlinuz-3.2.0-31-generic"
 ramdisk = "/home/xen/kernel/initrd.img-3.2.0-31-generic"
 extra = "root=/dev/xvda1 ro"

I thank in advance for any help

Giorgio Mossa

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