[JAVA3D] exception while picking

[Olivier Tassy]

Hi, I use the following code to perform a pick, but it returns "RestrictedAccessException: Cannot modify capability bits on a live scene or compiled object" What kind of setting do I need to avoid this?   many thanks in advance OLivier.                      scene.setCapability(Node.ENABLE_PICK_REPORTING);                     (...)                     // build pick ray object from ray origin and direction                             PickRay ray = new PickRay(rayOrg, rayDir);                       // throw the pick ray into the scene at all the leaf shape                     // nodes under the pick root                     SceneGraphPath paths[] = scene.pickAllSorted(ray);                       if( paths != null) {                               // shape target bounds were hit, check for real hits                             for( int hitI= 0; hitI< paths.length; hitI++) {                                 System.out.println(" hit [" + hitI+ "]=" + paths[ hitI]);                                   // intersect pick ray with shape target geometry                                 Node shape = paths[ hitI].getObject();                                 double dist[] = {0.0};                                 Shape3D obj=( Shape3D) shape;                                                                 obj.setCapability(Shape3D.ALLOW_GEOMETRY_READ);                //same problem when the capabilities are set directly in the BG scene                                 obj.getGeometry().setCapability(Geometry.ALLOW_INTERSECT);                                                                  boolean isRealHit = obj.intersect(paths[ hitI], ray, dist);                                   if( isRealHit) {                                     // compute hit point from hit distance and pick ray                                     Point3d point = new Point3d();                                     point.scaleAdd( dist[ 0], rayDir, rayOrg);                                       System. out. println("real hit at " + point);                                 }                               }                     } (most of this code comes from the java boutique web site)