[JAVA3D] need help java3d code

[Brobbey,Isaac (neuron)]

i am getting an error when i try to make two or more displays by
repeatedly calling  this method below:

void enumKids(Group tg)
    {

        java.util.Enumeration enumKids = tg.getAllChildren();
        while (enumKids.hasMoreElements())
        {
                System.out.println("More elements to check");
                SceneGraphObject sg = (SceneGraphObject)
enumKids.nextElement();
                if (sg instanceof Shape3D || sg instanceof Morph)
                {
        PickTool.setCapabilities((Node) sg, PickTool.INTERSECT_FULL);
                        sg.setCapability(PickTool.INTERSECT_FULL);
   System.out.println("Capability = " +
sg.getCapability(PickTool.INTERSECT_FULL));
                }
        }
    }

i am getting the following error

Size of vector is 312
Exception in thread "main" javax.media.j3d.RestrictedAccessException:
Cannot modify capability bits on a live or compiled object
at javax.media.j3d.SceneGraphObject.setCapability(SceneGraphObject.java:
101)
 at
com.sun.j3d.utils.picking.PickTool.setCapabilities(PickTool.java:283)

 at
com.sun.j3d.utils.picking.PickTool.setCapabilities(PickTool.java:270)

        at Graphic.enumKids(Graphic.java:301)
        at Graphic.createConeTransformGroup(Graphic.java:277)
        at Graphic.createSceneGraph(Graphic.java:532)
        at Graphic.<init>(Graphic.java:684)
        at Tabed.<init>(Graphic.java:1393)
        at Graphic.main(Graphic.java:85)


Is there any work around on the PickTool ? how can I modify the PickTool
to make it work for two or more displays ? i am running out of Ideas , i
will appreciate any help.

thanks,

isaac

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