jmonkey shows blackscreen with blender models

Question

So I build a model of a tank in blender which I implemented later on in jmonkey with a spatial. But when I gave the model texture, materials and morde detail, jmonkey responds with an error "NullPointerExeption" and closes the test application which ended as a blackscreen before.

Is anyone familiar with this problem?

Answer 1

Stacktrace:

    java.lang.NullPointerException
at com.jme3.export.binary.BinaryImporter.readObject(BinaryImporter.java:314)
at com.jme3.export.binary.BinaryImporter.load(BinaryImporter.java:242)
at com.jme3.export.binary.BinaryImporter.load(BinaryImporter.java:125)
at com.jme3.export.binary.BinaryImporter.load(BinaryImporter.java:109)
at com.jme3.asset.DesktopAssetManager.loadLocatedAsset(DesktopAssetManager.java:259)
at com.jme3.asset.DesktopAssetManager.loadAsset(DesktopAssetManager.java:373)
at com.jme3.asset.DesktopAssetManager.loadModel(DesktopAssetManager.java:416)
at com.jme3.asset.DesktopAssetManager.loadModel(DesktopAssetManager.java:420)
at mygame.Main.makeScene(Main.java:122)
at mygame.Main.simpleInitApp(Main.java:56)
at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:220)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.initInThread(LwjglAbstractDisplay.java:130)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:211)
at java.lang.Thread.run(Thread.java:745)