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ZMQ Error 19 when binding ZMQ_PUB type socket

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I have a simple code chunk that establishes a ZMQ_PUB type socket to broadcast data packets. However, I am finding that this code works on some Windows machines and not others.

Working machine details: ZMQ version 4.3.5, Windows 11.Not-working machine details: ZMQ version 4.3.5, Windows 10.

#include <string>#include <iostream>#include <zmq.h>this->publisher_context = zmq_ctx_new();this->publisher_socket = zmq_socket(this->publisher_context, ZMQ_PUB);assert(this->publisher_socket);std::string address = "tcp://localhost:5556";int broadcastConnect = zmq_bind(this->publisher_socket, address.c_str());if (broadcastConnect != 0) {    int error_code = zmq_errno();    std::string text = "Broadcast socket did not connect correctly. ZMQ error code: " + std::to_string(error_code);    std::cout << text.c_str() << std::endl;}

This code throws ZMQ Error 19 (ENODEV).

Things I have tried on the not-working machine:

  • Checked my open TCP port usage through cmd using netstat (port is not in use)
  • This address (tcp://localhost:5556) is available, I am able to instead create a ZMQ_REQ type socket on the same port. Binding the ZMQ_PUB errors out. This tells me that localhost is configured correctly. Additionally, replacing localhost in the address string with [::1] produces the same results.
  • Temporarily disabled my Windows Defender Firewall Domain/Private/Public profiles and rebooted, same results.

Things I'll try next:

  • Upgrade not-working machine to Windows 11, although I'd rather not if possible.

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