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How to tell if a port is open/closed ?

 [1/3] from: arolls:bigpond:au at: 20-Aug-2001 14:33

I have a server like this: server-port: open/direct/no-wait/lines tcp://:4321 connection-port: first server-port append ports: copy [] connection-port ; client connects and disconnects... ; disconnect all foreach port ports [if port [close port]] ** Access Error: Port none not open ** Where: disconnect ** Near: close port This happens if I try to close it twice, but I was hoping the test: if port [close port] would only try to close ports for open ports. ** How do I tell if a port is open? Merci, Anton.

 [2/3] from: petr:krenzelok:trz:cz at: 20-Aug-2001 7:12

Hi, what about try to catch error? try [close port] -pekr- Anton wrote:

 [3/3] from: arolls::bigpond::net::au at: 20-Aug-2001 16:53

Well, that's what I'm now doing, but I thought there should be a way to see if port is open first. I tried if port? port [close port] as Tim suggested, but I get the same error. Anyway, it's resolved by catching the error. Regards,