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Sudheer, Please give us more information concerning how you arrived at the error below. Best Wishes, Unidata IDV Support > Full Name: sudheer > Email Address: address@hidden > Organization: INCOIS > Package Version: 4.1 build date:2013-08-02 18:38 UTC > Operating System: Linux > Hardware: Java: home: /home/sjo/IDV_4.1/jre version: 1.6.0_41 j3d:1.5.2 fcs > (build4) > Description of problem: calculating Rectangle > cannot invert matrix > > ****************** > Stack trace: > javax.vecmath.SingularMatrixException: cannot invert matrix > at javax.media.j3d.Transform3D.invertAffine(Transform3D.java:3031) > at javax.media.j3d.Transform3D.invert(Transform3D.java:2851) > at visad.java3d.MouseBehaviorJ3D.findRay(MouseBehaviorJ3D.java:184) > at ucar.unidata.view.geoloc.NavigatedDisplay.getRay(NavigatedDisplay.java:464) > at > ucar.unidata.view.geoloc.NavigatedDisplay.getSpatialCoordinatesFromScreen(NavigatedDisplay.java:442) > at > ucar.unidata.view.geoloc.NavigatedDisplay.getVisadBox(NavigatedDisplay.java:1693) > at > ucar.unidata.idv.control.DisplayControlBase.calculateRectangle(DisplayControlBase.java:857) > at > ucar.unidata.idv.control.DisplayControlImpl.controlChanged(DisplayControlImpl.java:2671) > at visad.Control.changeControl(Control.java:95) > at visad.java3d.ProjectionControlJ3D.setMatrix(ProjectionControlJ3D.java:136) > at > visad.java3d.DisplayRendererJ3D.render_trigger(DisplayRendererJ3D.java:1563) > at visad.java3d.DisplayRendererJ3D.setWaitFlag(DisplayRendererJ3D.java:1574) > at visad.DisplayImpl.doAction(DisplayImpl.java:1750) > at visad.ActionImpl.run(ActionImpl.java:413) > at visad.util.ThreadPool$ThreadMinnow.run(ThreadPool.java:136) > > > Ticket Details =================== Ticket ID: XKQ-334571 Department: Support IDV Priority: Normal Status: Closed