[arunk]

I am declaring the class as:

private final class OnDemandDialog extends PopupScreen {
...............
}

I am pushing the screen like this:

   onDemandDialog=new OnDemandDialog();
   //this.onDemandDialog=onDemandDialog;
   UiApplication.getUiApplication().pushScreen(onDemandDialog);

inside callIncoming event

UiApplication.getUiApplication().invokeLater(new Runnable()
{
      public void run()
      {
           synchronized(UiApplication.getEventLock()){
                  onDemandDialog.close();
           }
      }
});

then i am getting that exception