Hi Jaap and all,
I followed that hint and found out :
All interfaces are connected (as seen in the table of network connections)
- the physical interface is connected to a switch and the loopback are
connected anyway. Still the same error.
However :
All interfaces had IP addresses, EXCEPT the physical interface. I prefer to
have the host out of the network and work with the guest machines only. As
soon as I gave the physical NIC an arbitrary IP address, everything worked
fine, no errors, no crashes !
Thanks to the list, you guys are great !
Later,
Oliver