[JAVA3D] transformGroup setUserData & getUserData

[Chauveau Wong]

Hi all,

   I have a strange problem. In my project, I use:

  TransformGroup TG ;
  ...
  TG.setUserData(myobject);

  ...
 when I use :
 myobject = TG.getUserData();

 Sometime it runs correctly. Sometime it has error because myobject gets
null.
 java.lang.NullPointerException.

 It seems it is not stable. Can anyboty give some clue about it?

 Thanks a lot.

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