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>From: "Doug Lindholm" <address@hidden> >Organization: UCAR/Unidata >Keywords: 200507152253.j6FMrf2h021755 IDV SoundingControl Hi Doug- >Institution: UCAR >Package Version: 1.2 >Operating System: os.name:Linux; os.arch:i386; os.version:2.6.11-1.27_FC3smp; >Hardware Information: java.vendor:Sun Microsystems Inc.; java.version:1.4.2_08 > ; java.home:/sparky/opt/j2sdk1.4.2_08/jre; >Inquiry: When going through section 3.1.4 (Probing Gridded Data) in the latest > workshop >material using the nightly build, I get the following error when I try to crea > te the >skew-t display. Thanks for finding this. It was a problem where the panel of boxes had not been initialized and something was trying to update it. I put a wrapper around it to check for the null condition. >An error has occurred: >Error >java.lang.NullPointerException > >****************** >Stack trace: >java.lang.NullPointerException > at ucar.visad.display.AnimationWidget$2.propertyChange(AnimationWidget. > java:619) > at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSu > pport.java:252) > at ucar.visad.display.Displayable.firePropertyChange(Displayable.java:9 > 00) > at ucar.visad.display.Animation$AnimationControlListener.controlChanged > (Animation.java:927) > at visad.Control.changeControl(Control.java:95) > at visad.java2d.AnimationControlJ2D.setCurrent(AnimationControlJ2D.java > :162) > at visad.AnimationSetControl.setSet(AnimationSetControl.java:150) > at visad.java2d.AnimationSetControlJ2D.setSet(AnimationSetControlJ2D.ja > va:50) > at visad.java2d.AnimationControlJ2D.setSet(AnimationControlJ2D.java:366 > ) > at visad.ScalarMap.setRange(ScalarMap.java:726) > at visad.ScalarMap.setRange(ScalarMap.java:585) > at visad.DisplayRenderer.prepareAction(DisplayRenderer.java:852) > at visad.DisplayImpl.doAction(DisplayImpl.java:1646) > at visad.java2d.DisplayImplJ2D.doAction(DisplayImplJ2D.java:312) > at visad.ActionImpl.run(ActionImpl.java:353) > at visad.util.ThreadPool$ThreadMinnow.run(ThreadPool.java:95) Don Murray NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.