Can you please clarify what you mean by you "try to start the leanft engine thru code"? What code are you using to try to start LeanFT (UFT Developer)? Please provide a sample. See this link for Instructions to start LeanFT Runtime Engine.

Also, make sure port 5095 is open. UFT Developer needs this port open to work properly. You can see information on the port at this link.

I tried to launch Internet explorer  by using the below program.

package edu.aspire.test;

import java.io.File;
import java.net.InetAddress;
import java.net.URI;
import com.hp.lft.report.Reporter;
import com.hp.lft.sdk.ModifiableSDKConfiguration;
import com.hp.lft.sdk.SDK;
import com.hp.lft.sdk.web.Browser;
import com.hp.lft.sdk.web.Browser.BrowserFacotry;
import com.hp.lft.sdk.web.Browser.BrowserType;

public class IElaunchTest {
static Browser browser=null;
public static void main(String args[])
{
InetAddress idAddr=InetAddress.getLocalHost();
Runtime.getRuntime().exec("C:\Pgmfiles(x86)\HP\unified functional Testing\bin\LFTRuntime.exe",null
,new File("C:\ProgramFiles(x86)\HP\Unified Functional Testing\bin\"));
Thread.sleep(1000);
ModifiableSDKConfiguration config=new ModifiableSDKConfiguration();
config.setServerAddress (new URI("ws://"+idAddr.getHostAddress()+":5095"));
Thread.sleep(500);
SDK.init(config);
Reporter.init();
browser=BrowserFactory.launch(BrowserType.INTERNET.EXPLORER);
System.out.println("IE is launched");

}

}

==========

Softwares I have in my PC: UFT along with leanft plugin( version 12.54.2159), Windows, JAVA 8 , eclipse Mars 2 release (4.5.2)

When i run the above program i am gettng below error

com.hp.lft.sdk.internal.communication.CommunicationException.

Error in connecting to leanft runtime engine on ws:<ipaddress>:5095 at com.hp.lft.sdk.internal.communication.DefultSockerConnection.connect(DefaultSocketConnection.java:72)