title: failed to create an XPathFactory
body: <p>I'm trying to run LightSide (<a href="http://lightsidelabs.com/what/research/" rel="nofollow">http://lightsidelabs.com/what/research/</a>), a machine learning tool kit. However, when I run the included batch file, it crashes on the splash screen, and the log contains the following error.</p>
  
  <pre><code>Exception in thread "main" java.lang.ExceptionInInitializerError
      at edu.cmu.side.plugin.control.PluginManager.createPluginOfFolder(PluginManager.java:105)
      at edu.cmu.side.plugin.control.PluginManager.createPluginTypeMap(PluginManager.java:134)
      at edu.cmu.side.plugin.control.PluginManager.&lt;init&gt;(PluginManager.java:164)
      at edu.cmu.side.plugin.control.PluginManager.getSharedPluginManager(PluginManager.java:178)
      at edu.cmu.side.plugin.control.PluginManager.getSIDEPluginArrayByType(PluginManager.java:80)
      at edu.cmu.side.control.ExtractFeaturesControl.&lt;clinit&gt;(ExtractFeaturesControl.java:56)
      at edu.cmu.side.view.extract.ExtractFeaturesPane.&lt;clinit&gt;(ExtractFeaturesPane.java:24)
      at edu.cmu.side.view.WorkbenchPanel.&lt;init&gt;(WorkbenchPanel.java:21)
      at edu.cmu.side.Workbench.&lt;init&gt;(Workbench.java:65)
      at edu.cmu.side.Workbench.main(Workbench.java:96)
  Caused by: java.lang.RuntimeException: XPathFactory#newInstance() failed to create an XPathFactory for the default object model: http://java.sun.com/jaxp/xpath/dom with the XPathFactoryConfigurationException: javax.xml.xpath.XPathFactoryConfigurationException: java.util.ServiceConfigurationError: javax.xml.xpath.XPathFactory: Provider oracle.xml.xpath.JAXPXPathFactory not found
      at javax.xml.xpath.XPathFactory.newInstance(Unknown Source)
      at com.mysterion.xml.XMLBoss.&lt;clinit&gt;(XMLBoss.java:93)
      ... 10 more
  </code></pre>
  
  <p>The source line causing this error (<code>PluginManager.java:105</code>) is the following line, which I recognize from other questions.</p>
  
  <pre><code>config = XMLBoss.XMLFromFile(configFile);
  </code></pre>
  
  <p>It seems that most problems originate from the programmer side, not the user side, so their solutions aren't relevant to my case. It's probably something to do with my Java installation, or that I'm missing a plugin or something, but the installation manual for this tool kit doesn't mention any installation outside of the usual Java installation.</p>
  
  <p>I've been searching for hours, but I cannot figure out the problem. Does anyone have an idea?</p>