Sorry for the late answer.
Yes, the EIB connection in Expert is set to USB connection.
When I connect the KNX interface to the host I can see it in Devices.
When I boot the guest I see the icon at the right bottom to connect it to the guest.
But when I do something in Visu nothing happens on the knx bus and the HS does not record any EIB telegrams.
Do you have to configure something for the USB connection?
Thank you for the answers