Can't connect to Interactive broker API with python show error 502, 504

Question

I can't connect to Interactive broker API with python it shows errors 502, 504 all the time when run the code

I have checked in the global configuration all parameters it's correct. -Checked Enable Active and Socket Clients -Socket port and Client ID, it's the same between API application and TWS.

I cannot connect API since this week but before that, I can connect API.

when i run my APIs it shows the error as below all the time.

Error: -1 502 Couldn't connect to TWS. Confirm that "Enable ActiveX and Socket EClients" is enabled and connection port is the same as "Socket Port" on the TWS "Edit->Global Configuration...->API->Settings" menu. Live Trading ports: TWS: 7496; IB Gateway: 4001. Simulated Trading ports for new installations of version 954.1 or newer: TWS: 7497; IB Gateway: 4002 Error: -1 504 Not connected

I have tried to run from my laptop but it's the same and also changed my service internet.

Here is my code.

from ibapi.client import EClient
from ibapi.wrapper import EWrapper
from ibapi.contract import Contract
from ibapi.ticktype import TickTypeEnum


class TestApp(EWrapper, EClient):
   def __init__(self):
   EClient.__init__(self, self)

 def error(self, reqId, errorCode, errorString):
   print("Error: ", reqId, " ", errorCode, " ", errorString)

 def contractDetails(self, reqId, contractDetails):
   print("contractDetails: ", reqId, " ", contractDetails)

def main():
  app = TestApp()
  app.connect(host="192.168.1.107",port=7498,clientId=0)

  contract = Contract()
  contract.symbol = "TNA"
  contract.secType = "STK"
  contract.exchange = "SMART"
  contract.currency = "USD"
  contract.primaryExchange = "ARCA"

  app.reqContractDetails(1,contract)

  app.run()
  app.disconnect()
if __name__ == "__main__":
   main()

How do i solve it?

Answer 1

The problem is your MASTER ID in the global configuration. If that is set to None or 0 then it will give you Error 504: Not Connected. Try different master id for example 999. Then set it to your code. Global Configuration IBKR