Error Message:

WINSOCK Error: ICMP network unreachable.

Explanation:

The local network system might generate this error if there is no default route configured. Typically, though, WinSock generates this error when it receives a "host unreachable" ICMP message from the router. The ICMP message means that a router cannot forward the IP datagram, possibly because it did not get a response to the ARP request (which might mean the destination host is down). Note: This error might also result if you are trying to send a multicast packet and the default gateway does not support multicast (check your interface configuration).

User Action:

Try to ping the destination host, to see if you get the same results (chances are, you will). Check the destination address. Check whether you have a router configured in your network system (your WinSock implementation). Use the tracert command at the command prompt to try to determine where the failure occurs along the route between your host and the destination host.