java.lang.NullPointerException
at org.ob3d.jme.MainGame.enableState(MainGame.java:13
at org.ob3d.jme.MainGame$2.action(MainGame.java:121)
at org.ob3d.jme.JMETaskQueue$2.call(JMETaskQueue.java:32)
at com.jme.util.GameTask.invoke(GameTask.java:140)
at com.jme.util.GameTaskQueue.execute(GameTaskQueue.java:111)
at org.ob3d.jme.OBStandardGame.update(OBStandardGame.java:345)
at org.ob3d.jme.OBStandardGame.run(OBStandardGame.java:216)
at java.lang.Thread.run(Unknown Source)