Hi Yakup, You need Java3D to be installed on the JVM you are running your apps from. It could be that your Java3D has been installed on another JVM. Try to locate the J3D-Files (j3daudio.jar, j3dcore.jar, j3dutils.jar, vecmath.jar, in jdk*.*/jre/lib/ext) and try to run your java interpreter from this JVM. Hope that helps. Cheers, Mathias
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