java.lang.ClassNotFoundException: org.jaxen.JaxenException
   at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
   at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
Caused: java.lang.ClassNotFoundException: org.jaxen.JaxenException starting from ModuleCL@16744cae[pmd] with possible defining loaders null and declared parents [ModuleCL@67251675[org.netbeans.api.java.classpath], ModuleCL@79f7e9d3[org.netbeans.modules.queries], ModuleCL@61656596[org.netbeans.api.progress], ModuleCL@5e80188f[org.netbeans.modules.editor], ModuleCL@4ea21c60[org.openide.loaders], ModuleCL@74133879[org.jdesktop.layout], ModuleCL@79c21ab9[org.netbeans.modules.editor.settings], ModuleCL@f19267b[org.openide.io], ModuleCL@366237a0[org.openide.awt], ModuleCL@1770008e[org.netbeans.modules.java.source], ...9 more]
   at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:224)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
Caused: java.lang.NoClassDefFoundError: org/jaxen/JaxenException
   at net.sourceforge.pmd.rules.XPathRule.getRuleChainVisits(XPathRule.java:87)
   at net.sourceforge.pmd.CommonAbstractRule.usesRuleChain(CommonAbstractRule.java:346)
   at net.sourceforge.pmd.AbstractRuleChainVisitor.initialize(AbstractRuleChainVisitor.java:123)
   at net.sourceforge.pmd.AbstractRuleChainVisitor.visitAll(AbstractRuleChainVisitor.java:46)
   at net.sourceforge.pmd.RuleChain.apply(RuleChain.java:67)
   at net.sourceforge.pmd.RuleSets.apply(RuleSets.java:133)
   at net.sourceforge.pmd.PMD.processFile(PMD.java:126)
   at net.sourceforge.pmd.PMD.processFile(PMD.java:75)
   at net.sourceforge.pmd.PMD.processFile(PMD.java:172)
   at pmd.RunPMDAction.performScan(RunPMDAction.java:218)
   at pmd.scan.Scanner.run(Scanner.java:118)
   at pmd.scan.Scanner.run(Scanner.java:55)
   at org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:298)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:561)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:737)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
   at java.lang.Thread.run(Thread.java:722)