I don't know if I'm writing at the right place but it is because I'm quite lost.

The problem is someone is trying to trackback a post of mine and when doing so he gets this error:

targeted server is sending empty answer

When I look into the address he uses for the trackback I get this message:

No url to your permanent entry given

To an Admin or Moderator: If I'm writing to the wrong section please move the message.