E/AndroidHarness(12898): java.lang.AbstractMethodError: abstract method not implemented
E/AndroidHarness(12898): SEVERE AndroidHarness 2:07:18 PM Exception thrown in Thread[GLThread 10,5,main]: at com.jme3.input.android.AndroidInput.getSimulateMouse(-1)
E/AndroidHarness(12898): at com.jme3.input.InputManager.getSimulateMouse(740)
E/AndroidHarness(12898): at com.jme3.niftygui.InputSystemJme.onTouchEventQueued(101)
E/AndroidHarness(12898): at com.jme3.niftygui.InputSystemJme.forwardEvents(240)
E/AndroidHarness(12898): at de.lessvoid.nifty.Nifty.update(248)
E/AndroidHarness(12898): at com.jme3.niftygui.InputSystemJme.endInput(92)
E/AndroidHarness(12898): at com.jme3.input.InputManager.processQueue(787)
E/AndroidHarness(12898): at com.jme3.input.InputManager.update(851)
E/AndroidHarness(12898): at com.jme3.app.Application.update(605)
E/AndroidHarness(12898): at com.jme3.app.SimpleApplication.update(233)
E/AndroidHarness(12898): at com.jme3.system.android.OGLESContext.onDrawFrame(412)
E/AndroidHarness(12898): at android.opengl.GLSurfaceView$GLThread.guardedRun(1431)
E/AndroidHarness(12898): at android.opengl.GLSurfaceView$GLThread.run(1180)
E/AndroidHarness(12898):
this is an error that I get when running my application on android.
Does anybody know how to solve this error ?
thank you in advance :)