Could this error be related to TclUDP?

The error I'm seeing is

     Error: Unknown offered protocols "" from <IP>/<PORT>
     [traceback omitted, but ultimately called from within]
     ::comm::commIncoming ::comm::comm <SOCK> <IP> <PORT>

The application throwing this error uses TclUDP, and I wonder if that
could be affecting something. Starting with a remote machine that can
ping the host in question and talk to the app via ::comm::comm send,
eventually the connection "flakes out" but doesn't go away entirely.
Ping no longer works, and ::comm::comm send causes the above error to
repeat about 4 times over the course of 5 minutes or so, then times out.
  This is on Solaris 9 with ActiveTcl 8.4.7 (I think).

I also wonder if it could be a flaky network switch, because sometimes
plugging the cables into different ports "fixes" the problem.

Google turned up *no* hits on the phrase "unknown offered protocols".
Received on Sun Apr 30 02:17:54 2006