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[Peter Quiring <944857@xxxxxxxxxxxxxxxxxx>]

FYI : I downloaded 7.1.1 from netbeans.org and it works fine.
When I use Ubuntu version it says "Loading..." on the JPanel but the exception occurs and stops Loading so you can't use the GUI builder.

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https://bugs.launchpad.net/bugs/944857

Title:
  Exception occurs in GUI Builder in NetBeans :
  java.lang.ClassNotFoundException: org.w3c.dom.ElementTraversal

Status in “openjdk-6” package in Ubuntu:
  New

Bug description:
  NetBeans 7.0.1 fails to open GUI Builder for JPanels / JFrames / etc.
  An exception occurs rendering NetBeans useless.
  Using Ubuntu 12.04 beta 1
  I've used NetBeans downloaded from their website in the past, so the problem must be in Ubuntu's package.

  Thanks.

  Here is the full exception:

  java.lang.ClassNotFoundException: org.w3c.dom.ElementTraversal
  	at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
  	at java.security.AccessController.doPrivileged(Native Method)
  	at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
  	at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
  	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
  	at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
  Caused: java.lang.ClassNotFoundException: org.w3c.dom.ElementTraversal starting from ModuleCL@36d047[org.netbeans.libs.xerces] with possible defining loaders [ModuleCL@9c176c[org.netbeans.modules.swingapp]] and declared parents []
  	at org.netbeans.ProxyClassLoader.loadClass(Unknown Source)
  	at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
  Caused: java.lang.NoClassDefFoundError: org/w3c/dom/ElementTraversal
  	at java.lang.ClassLoader.defineClass1(Native Method)
  	at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
  	at org.netbeans.JarClassLoader.doLoadClass(Unknown Source)
  Caused: java.lang.NoClassDefFoundError: org/w3c/dom/ElementTraversal while loading org.apache.xerces.dom.ElementImpl; see http://wiki.netbeans.org/DevFaqTroubleshootClassNotFound
  	at org.netbeans.ProxyClassLoader.selfLoadClass(Unknown Source)
  	at org.netbeans.ProxyClassLoader.loadClass(Unknown Source)
  	at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
  	at java.lang.ClassLoader.defineClass1(Native Method)
  	at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
  	at org.netbeans.JarClassLoader.doLoadClass(Unknown Source)
  Caused: java.lang.NoClassDefFoundError: org/w3c/dom/ElementTraversal while loading org.apache.xerces.dom.ElementImpl; see http://wiki.netbeans.org/DevFaqTroubleshootClassNotFound while loading org.apache.xerces.dom.ElementNSImpl; see http://wiki.netbeans.org/DevFaqTroubleshootClassNotFound
  	at org.netbeans.ProxyClassLoader.selfLoadClass(Unknown Source)
  	at org.netbeans.ProxyClassLoader.loadClass(Unknown Source)
  	at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
  	at org.apache.xerces.parsers.AbstractDOMParser.startDocument(Unknown Source)
  	at org.apache.xerces.impl.dtd.XMLDTDValidator.startDocument(Unknown Source)
  	at org.apache.xerces.impl.XMLDocumentScannerImpl.startEntity(Unknown Source)
  	at org.apache.xerces.impl.XMLVersionDetector.startDocumentParsing(Unknown Source)
  	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
  	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
  	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
  	at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
  	at org.netbeans.modules.form.GandalfPersistenceManager.canLoadForm(Unknown Source)
  	at org.netbeans.modules.form.FormDesigner$PreLoadTask.getPersistenceManager(Unknown Source)
  	at org.netbeans.modules.form.FormDesigner$PreLoadTask.run(Unknown Source)
  [catch] at org.openide.util.RequestProcessor$Task.run(Unknown Source)
  	at org.openide.util.RequestProcessor$Processor.run(Unknown Source)

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: openjdk-6-jre-headless 6b24-1.11.1-3ubuntu2
  ProcVersionSignature: Ubuntu 3.2.0-17.27-generic-pae 3.2.6
  Uname: Linux 3.2.0-17-generic-pae i686
  NonfreeKernelModules: nvidia
  ApportVersion: 1.93-0ubuntu2
  Architecture: i386
  Date: Fri Mar  2 09:36:20 2012
  ExecutablePath: /usr/lib/jvm/java-6-openjdk-i386/jre/bin/java
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120301)
  ProcEnviron:
   SHELL=/bin/bash
   PATH=(custom, user)
   LANG=en_US.UTF-8
  SourcePackage: openjdk-6
  UpgradeStatus: No upgrade log present (probably fresh install)

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