I don't have anything useful to add I'm afraid. I posted mainly to point out that the extended error is to be expected (and accommodated) with non-blocking handles; and that the logic of your test code shouldn't require non-blocking socket.

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Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
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In reply to Re^3: Error - A non-blocking socket operation could not be completed immediately. by BrowserUk
in thread Error - A non-blocking socket operation could not be completed immediately. by perl514

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