xxx.example.com-eth0.tap missing

Hi everybody

I got Cloudmin and webmin installed on a Ubuntu 12.10 Server machine together with an kvm, openvpn and samba.

When creating a new kvm i get this nasty cant initialize tap device error. The thing that makes me think that the file xxx.example.com-eth0.tap that is called in xxx.example.com-eth0.sh is missing.

Question is: Is the file created when the vm starts or is it missing somehow ? If the file is missing where lies the error ?