[JAVA3D] Pick Behavior problem

[P Watson]

 

        Hi
         
        I was wondering if someone can shed some light on a problem. I have a shape 
whitch i have placed on a canvas and which i would like to add another shape to join 
onto it. I have a pick routine which provides the x,y,z coords but unfortunately 
causes an error when i click on the intial shape. It says that to pick a branchgroup 
it needs to be alive. Does anyone know how to solve it or get around the problem ?
         
        Paul