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hopen 5001 => ‘hop. OS reports:
Any clue about:
q)hopen 5001
‘hop. OS reports: No connection could be made because the target machine actively refused it.
[0] hopen 5001
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4 Replies
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It doesn’t necessarily mean that the port is not available, but that there is currently no process listening on it.
If you are expecting a server to be running on that port, you might want to check what’s up with it – it might be crashing or hanging in an error trap, not reaching the point where it opens the port.
If you are just experimenting, you first need to start a second q process with the command line parameters -p 5001 which will make it listen on that port.
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https://code.kx.com/q/basics/errors/#:~:text=formed%20select%20query-,hop,-Request%20to%20hopen
hop
Request to
hopena handle fails; includes message from OSYour code is trying to open a handle to a process listening on port 5001 but one is not available.
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Thank you for reply.
Does that mean the port is not available to be listened to?
How can I find out which ports can be chosen in this case?
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Right, you’re right
Before using the hopen command, it is necessary to open the port listening with the p command:
p 5001 /system[“p 5001”] /q.exe -p 5001
hopen 5001
Now work
Thank you to all for answer
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