Indeed but this connection related like restarted firewall, dropped internet connections etc are usual in a teamwork/network office.
The BIM server must manage all this problems and anounce the admin that is a problem (internal BIM errors).
The main problem it's with Archicad, i get this "reattach" error without any network related problems... it just happent...
We want to help graphisoft and other users to avoid this kind of problems, we need as users a flowless server solution, as much as possible.
This thread it's linked with this one
http://archicad-talk.graphisoft.com/viewtopic.php?t=29904