[pallago]

Hi curlymo,
you are right. I commented/removed the following line:
iface lo inet loopback
Consequently, it did not work; the error message appeared:
pilight-receive: ERROR: no pilight ssdp connections found

Therefore, I added again the line
iface lo inet loopback

Thanks a lot.

So summarizing:
The error could be solved by using adding "iface lo inet loopback" in /etc/network/interfaces