I am was trying out sockets. These worked fine under linux. Under windows I get the following error. Does anyone know what it means and how I can fix it? I can telnet from within the cygwin window so I assume tcp/ip is running. Thanks, Dominic. administrator@DEFAULT /cygdrive/d/dom/home/socketTest $ ./server1 8000 Fail: does not exist Action: getProtocolByName Reason: no such protocol entry ------------------------------------------------------------------------------------------------- 21st century air travel http://www.britishairways.com