> (2) With the code below I open port 2500 for listening, multicast a 
> packet, and then listen for 5 seconds before closing the socket. 
> However, if I try to repeat this sequence a 2nd time, even though
> I've closed the socket after listening for 5 seconds, I get
> following error 

I've just been writing a UDP echo component, which is very similar what 
you doing.  With UDP, connect and listen seem to be the same thing.  So 
specify Addr and Port, then connect, send, and you'll get your responses 
in data available.  

Angus
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