[JAVA3D] Java3D is giving NullPointerException while rendering on two Canvas3D

[Joachim Bratteli]

Java3D is giving NullPointerException while rendering on two Canvas3D:

java.lang.NullPointerException
        at
javax.media.j3d.GeometryArrayRetained.updateAlphaInInterLeavedData(GeometryArrayRetained.java:2133)
        at
javax.media.j3d.GeometryArrayRetained.execute(GeometryArrayRetained.java:2312)
        at
javax.media.j3d.VertexArrayRenderMethod.renderGeo(VertexArrayRenderMethod.java:80)
        at
javax.media.j3d.VertexArrayRenderMethod.render(VertexArrayRenderMethod.java:53)
        at javax.media.j3d.RenderMolecule.render(RenderMolecule.java:1941)
        at javax.media.j3d.TextureBin.renderList(TextureBin.java:1312)
        at javax.media.j3d.TextureBin.renderList(TextureBin.java:1285)
        at javax.media.j3d.TextureBin.render(TextureBin.java:1275)
        at javax.media.j3d.TextureBin.render(TextureBin.java:1229)
        at javax.media.j3d.AttributeBin.render(AttributeBin.java:389)
        at javax.media.j3d.EnvironmentSet.render(EnvironmentSet.java:426)
        at javax.media.j3d.LightBin.render(LightBin.java:361)
        at javax.media.j3d.RenderBin.renderOrderedBin(RenderBin.java:5110)
        at javax.media.j3d.RenderBin.renderOrderedBins(RenderBin.java:5069)
        at javax.media.j3d.RenderBin.renderOrdered(RenderBin.java:5062)
        at javax.media.j3d.Renderer.doWork(Renderer.java:1267)
        at javax.media.j3d.J3dThread.run(J3dThread.java:250)
Any suggestions to what this problem could be?

--
 Joachim Bratteli - [EMAIL PROTECTED]
System Programmer - IFE / OECD Halden Reactor Project
 Halden VR Centre - http://www.ife.no/vr/
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