Target machine actively refused connection

[M_ichel]

Hi.

NT 7.

Can't connect to my Interactive Brokers simulated account.

I'm moving my trading from machine A to machine B. Used the "Backup & Restore" approach.

I can connect to my live IB account, no problem. Without even looking at the connection options for that account in NT.

I can connect to Kinetick no problem: didn't even look at the account parms.

But I can't connect to my IB simulated account: I get the msg "Login failed: IB Adapter MessageLoop No connection could be made because the target machine actively refused it::1:7496".

Searched in the forum but couldn't find anything which I hadn't already tried... Double checked the TWS API parms. Even replaced, in the NT account connection parms, the IP address which was in the "Host" parm with "localhost", as suggested.

What's the next step?

Thanks!

[NinjaTrader_ChelseaB]

Hello M_ichel,

Have you followed the connected guide for Interactive Brokers?

http://ninjatrader.com/ConnectionGuides/Interactive-Brokers-Connection-Guide

http://ninjatrader.com/Help-Connection-Guides

Is ActiveX and Socket Clients enabled in TWS?
What ports are you using?

[M_ichel]

Hi Chelsea. Thanks for your response (on a Sunday!)

Yes, I followed the instructions.

Except, I did not create an account connection, since I already had one... I'm tempted to delete the NT/Tools/Account Connections.../IB Simulated and recreate a new one...

What throws me is the fact that in order to connect to the live IB account, I didn't have to do anything!!! I just selected that connection and off it went! First time!

Should I delete the connection and create a new one?

Thanks.

[NinjaTrader_ChelseaB]

Hi M_ichel,

Using the old connection should be ok as long as this is an Interactive Brokers connection type.

What is the port number used in the connection in NinjaTrader?
May we have a screenshot of this?

I'm seeing 7496 in TWS.

[M_ichel]

Hi Chelsea.

Here are snapshots of my two IB connections, the simulated one and the live one. The only difference I can see is that the live one has an IP address in the "Host" parm...

Thanks.

[NinjaTrader_EricB]

Thank your for your reply,

I suggest making sure again that the correct version of TWS is downloaded and confiured per our connection guide.

If you still see the same, try changing the 'Host (optional)' field from 127.0.0.1 to "localhost" from the NinjaTrader connection options (Tools > Account Connections > Select your connection > Change).

We look forward to assisting further.

[M_ichel]

Problem SOLVED

Hi Eric.

Yes, I'm using 944.3 (and I get the IB warning about this version not being supported after June when I connect to my live account).

What I just did to resolve the problem, was
1- delete the existing connection
2- create a new one as per the Ninja guide

It worked first time.

Thanks.

[lovelmark]

This exception message says you're trying to connect to the same host ( 127.0.0.1 ), while you're stating that your server is running on a different host. This 127.0.0.1 represents a 'loopback' . It allows the computer to communicate with itself via network protocol .

Dns.GetHostEntry(IPAddress.Loopback).HostName returns the host name of your machine. When you pass a host name to TcpClient , it will resolve it to one or more IP addresses using Dns.GetHostAddresses(hostName) . This includes the public and local IP addresses of your machine (e.g. 192.168.12.10), but not 127.0.0.1 (loopback address). So your client is trying to connect to any of the non-loopback addresses of your machine, while your server is listening only on the loopback address . So, no connection can be established. The solution to this problem is that connect to the same end point your server is listening on.