i'm using this library https://code.google.com/p/matlabcontrol/ for java matlab connection. Everything works fine on netbeans java project, but the same code gives connection error on jforex.
Error comes out when establishing socket connection.

What might be the cause of work or not difference on netbeans and jforex?
Maybe anyone was on the same project?

Use @Library annotation for including libraries in jforex enironment:
https://www.dukascopy.com/wiki/#Include_libraries

Everething is ok with code, i guess. I get the "conn" message on connection exception. Here's piece of it.

package hello;

import com.dukascopy.api.*;
import matlabcontrol.*;
import matlabcontrol.MatlabConnectionException;
import matlabcontrol.MatlabInvocationException;
import com.dukascopy.api.IEngine.OrderCommand;
import com.mathworks.jmi.*;

@Library("jmi.jar;matlabcontrol-4.0.0.jar")
@RequiresFullAccess


public class MA_Play implements IStrategy {
 
    private IContext context = null;
    private IEngine engine = null;
    private IChart chart = null;
    private IIndicators indicators = null;
    private boolean posCreated = false;
    private int tagCounter = 0;
    private double[] ma1 = new double[Instrument.values().length];
    private IConsole console;
 
 public void rty() throws MatlabConnectionException, MatlabInvocationException
{
    //Create a proxy, which we will use to control MATLAB
    MatlabProxyFactory factory = new MatlabProxyFactory();
    MatlabProxy proxy = factory.getProxy();
    

    //Disconnect the proxy from MATLAB
    //proxy.disconnect();
}


    public void onStart(IContext context) throws JFException {
        this.console = context.getConsole();
        
        try {rty();
        }
        catch (MatlabInvocationException e){console.getOut().println("incob");}
        catch (MatlabConnectionException e){console.getOut().println("conn");}
        
        
        this.context = context;
        engine = context.getEngine();
        indicators = context.getIndicators();
    }
 

First please set up a program that succesfully works with the library. Then integrate the program into a strategy and try it in Standalone. And finally try it in JForex.
Also consider printing the exception message for more information, e.g.:

console.getOut().println("conn " + e);

13:12:42 connmatlabcontrol.MatlabConnectionException: Support code location was determined improperly; location does not actually exist. Location determined as: C:\JFOREX

i don't know why the location was determined like that, but anyway it's solved now. i'm new to java, so thx for exception hint, it helped.