This application always exits itself with a nullpointer exception
Exception in game loop
java.lang.NullPointerException
at jmetest.TutorialGuide.HelloModelLoading.simpleInitGame(HelloModelLoading.java:81)
at com.jme.app.BaseSimpleGame.initGame(BaseSimpleGame.java:503)
at com.jme.app.BaseGame.start(BaseGame.java:69)
at jmetest.TutorialGuide.HelloModelLoading.main(HelloModelLoading.java:65)
does anybody know where the problem is?