[JAVA3D] Does anybody knows what it is this exception?

[V�ctor]

Does anybody knows what it is this exception?

java.lang.NullPointerException
     at javax.media.j3d.RenderBin.processMessages(RenderBin.java:950)
     at
javax.media.j3d.StructureUpdateThread.doWork(StructureUpdateThread.java:83)

        at javax.media.j3d.J3dThread.run(J3dThread.java:256)

�Alguien sabe qu� es esta excepci�n?

--
Maldecir es el �nico lenguaje que dominan todos los programadores.

Hay dos productos que han salido de Berkeley:
el LSD y el UNIX. No creemos que sea una coincidencia.
(Jeremy S. Anderson).

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