[JAVA3D] Detaching a branch group

[Dean Keeler]

Hi all,

I am trying to detach a branch group and I keep getting the following error.
Can anyone help me?

Exception occurred during event dispatching: java.lang.NullPointerException
        at javax.media.j3d.LightRetained.clearLive(LightRetained.java:733)
        at javax.media.j3d.GroupRetained.clearLive(GroupRetained.java:1595)
        at javax.media.j3d.LinkRetained.clearLive(LinkRetained.java:171)
        at javax.media.j3d.GroupRetained.clearLive(GroupRetained.java:1595)
        at javax.media.j3d.GroupRetained.checkClearLive(GroupRetained.java:1087)
        at javax.media.j3d.GroupRetained.checkClearLive(GroupRetained.java:1051)
        at javax.media.j3d.GroupRetained.doRemoveChild(GroupRetained.java:288)
        at
javax.media.j3d.BranchGroupRetained.do_detach(BranchGroupRetained.java:78)
        at javax.media.j3d.BranchGroupRetained.detach(BranchGroupRetained.java:65)
        at javax.media.j3d.BranchGroup.detach(BranchGroup.java:97)
        at ObjectSelectPanel.hideOrShowSelectedNode(ObjectSelectPanel.java:1198)
        at ObjectSelectPanel.imgButtonClicked(ObjectSelectPanel.java:827)
        at ImageButton.mouseClicked(ImageButton.java:170)
        at java.awt.Component.processMouseEvent(Component.java:3163)
        at java.awt.Component.processEvent(Component.java:2999)
        at java.awt.Component.dispatchEventImpl(Component.java, Compiled Code)
        at java.awt.Component.dispatchEvent(Component.java, Compiled Code)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java,
Compiled Code)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:1841)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java, Compiled
Code)
        at java.awt.Container.dispatchEventImpl(Container.java, Compiled Code)
        at java.awt.Component.dispatchEvent(Component.java, Compiled Code)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java, Compiled Code)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java,
Compiled Code)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:92)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:83)

Thansk,

Dean Keeler
CNC Connection Corp

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