Metatrader 5 Python Socket/Websocket communication 4014 error

External question — Stack Overflow Stack Exchange Author: Paul Brink Original post: https://stackoverflow.com/questions/69843958 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. I am trying to create a communication interface between a python socket server and a Metatrader 5 Expert Advisor. I've tried multiple approaches and tutorial's I found online for both sockets and websockets. All of these approaches yield the same problem. Whenever I start a debug on live/historical data, I get a Socket creation error with code 4014. According to the error codes it is a "Function is not allowed for call" error. Multiple sources recommended to allow web request from specified URL's. Ive done this as well for 127.0.0.1 and localhost. (Tools > options > Expert Advisors) Why am I getting a function not allowed for call error, and how can this be fixed? Expert code: int socket=SocketCreate(); int OnInit() { if(SocketConnect(socket,"127.0.0.1",9090,1000)) { Print("Connected to "," 127.0.0.1",":",9090); } else { Print(GetLastError()); } return(INIT_SUCCEEDED); } void OnDeinit(const int reason) { SocketClose(socket); } void OnTick() { SocketClose(socket); }

External answer — Stack Overflow Stack Exchange Author: teslatrader Original post: https://stackoverflow.com/a/74086501 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. I faced the same problem. Works for me: to point exactly '127.0.0.1' (without upper commas) in address input field. Also, check your firewall settings - it may block your ports. The best regards.