java.lang.VerifyError Error while compiling JAVA - Matlab production Server answer

Hello guys,

I am trying to create a java ( Specifically android ) client for Matlab production server but I am getting the following error at compile time. I have no clue why this is happening. It has probably something to do with the interface but I have replicated the example provided in the documentation.

Here is the full error trace:

06-28 09:06:25.912 14727-14727/com.example.matlabservertest E/AndroidRuntime: FATAL EXCEPTION: main
                               Process: com.example.matlabservertest, PID: 14727
                               java.lang.VerifyError: com/mathworks/mps/client/internal/InterfaceValidator
                               at com.mathworks.mps.client.MWHttpClient.createProxy(Unknown Source)
                               at com.example.matlabservertest.MainActivity.onCreate(MainActivity.java:36)
                               at android.app.Activity.performCreate(Activity.java:5312)
                               at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1111)
                               at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2552)
                               at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653)
                               at android.app.ActivityThread.access$800(ActivityThread.java:156)
                               at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
                               at android.os.Handler.dispatchMessage(Handler.java:102)
                               at android.os.Looper.loop(Looper.java:157)
                               at android.app.ActivityThread.main(ActivityThread.java:5872)
                               at java.lang.reflect.Method.invokeNative(Native Method)
                               at java.lang.reflect.Method.invoke(Method.java:515)
                               at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:852)
                               at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:668)
                               at dalvik.system.NativeStart.main(Native Method)

Here is my code:

 public class MainActivity extends AppCompatActivity {

    double[][] a1={{1,2,3},{3,2,1}};
    double[][] a2={{4,5,6},{6,5,4}};

    interface MATLABAddMatrix
    {
        double[][] addmatrix(double[][] a1, double[][] a2)
                throws MATLABException, IOException;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        MWClient client = new MWHttpClient();
        try {
            MATLABAddMatrix m = client.createProxy(new URL("http://13.79.154.85:9910/addmatrix"),
                    MATLABAddMatrix.class);
            double[][] result = m.addmatrix(a1,
                    a2);

            for(double[] i : result){
                for (double j : i){
                    Log.i("RESULT",String.valueOf(j));
                }
            }
        }catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch  (MATLABException e){
            e.printStackTrace();
        } finally {
            client.close();
        }

    }
 }

Any ideas why this is happening??

Thank you