XDoclet Parsing Error

(TemplateEngine.invokeMethod         547 ) Invoking method failed: xdoclet.tagshandler.ClassTagsHandler.forAllClasses, line=36 of template file: jar:file:/D:/nbproject/Eric/resource/lib/xdoclet-1.2.3/xdoclet-web-module-1.2.3.jar!/xdoclet/modules/web/resources/web_xml.xdt
 
java.lang.reflect.InvocationTargetException
 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 
        at java.lang.reflect.Method.invoke(Method.java:324)
 
        at xdoclet.template.TemplateEngine.invoke(TemplateEngine.java:641)
 
        at xdoclet.template.TemplateEngine.invokeMethod(TemplateEngine.java:540)
 
        at xdoclet.template.TemplateEngine.invokeBlockMethod(TemplateEngine.java:965)
 
        at xdoclet.template.TemplateEngine.handleBlockTag(TemplateEngine.java:932)
 
        at xdoclet.template.TemplateEngine.handleTag(TemplateEngine.java:472)
 
        at xdoclet.template.TemplateEngine.generate(TemplateEngine.java:348)
 
        at xdoclet.XDocletTagSupport.generate(XDocletTagSupport.java:742)
 
        at xdoclet.tagshandler.ConfigTagsHandler.ifConfigParamGreaterOrEquals(ConfigTagsHandler.java:297)
 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 
        at java.lang.reflect.Method.invoke(Method.java:324)
 
        at xdoclet.template.TemplateEngine.invoke(TemplateEngine.java:641)
 
        at xdoclet.template.TemplateEngine.invokeMethod(TemplateEngine.java:540)
 
        at xdoclet.template.TemplateEngine.invokeBlockMethod(TemplateEngine.java:965)
 
        at xdoclet.template.TemplateEngine.handleBlockTag(TemplateEngine.java:932)
 
        at xdoclet.template.TemplateEngine.handleTag(TemplateEngine.java:472)
 
        at xdoclet.template.TemplateEngine.generate(TemplateEngine.java:348)
 
        at xdoclet.template.TemplateEngine.start(TemplateEngine.java:415)
 
        at xdoclet.TemplateSubTask.startEngine(TemplateSubTask.java:562)
 
        at xdoclet.TemplateSubTask.startProcessForAll(TemplateSubTask.java:618)
 
        at xdoclet.TemplateSubTask.startProcess(TemplateSubTask.java:599)
 
        at xdoclet.XmlSubTask.startProcess(XmlSubTask.java:227)
 
        at xdoclet.modules.web.WebXmlSubTask.execute(WebXmlSubTask.java:390)
 
        at xdoclet.XDocletMain.start(XDocletMain.java:48)
 
        at xdoclet.DocletTask.start(DocletTask.java:468)
 
        at xjavadoc.ant.XJavadocTask.execute(XJavadocTask.java:105)
 
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
 
        at org.apache.tools.ant.Task.perform(Task.java:364)
 
        at org.apache.tools.ant.Target.execute(Target.java:341)
 
        at org.apache.tools.ant.Target.performTasks(Target.java:369)
 
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
 
        at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:37)
 
        at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
 
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:382)
 
        at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:107)
 
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
 
        at org.apache.tools.ant.Task.perform(Task.java:364)
 
        at org.apache.tools.ant.Target.execute(Target.java:341)
 
        at org.apache.tools.ant.Target.performTasks(Target.java:369)
 
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
 
        at org.apache.tools.ant.Project.executeTarget(Project.java:1185)
 
        at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:40)
 
        at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
 
        at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:234)
 
        at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:287)
 
        at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:125)
 
Caused by: java.lang.NoClassDefFoundError: java/lang/StringBuilder
 
        at xjavadoc.filesystem.FileSourceSet.getRelativeFileName(FileSourceSet.java:242)
 
        at xjavadoc.filesystem.FileSourceSet.getSourceFile(FileSourceSet.java:120)
 
        at xjavadoc.XJavaDoc.getSourceFile(XJavaDoc.java:794)
 
        at xjavadoc.XJavaDoc.sourceExists(XJavaDoc.java:846)
 
        at xjavadoc.XJavaDoc.getXClass(XJavaDoc.java:403)
 
        at xjavadoc.XJavaDoc.getOuterSourceClasses(XJavaDoc.java:760)
 
        at xjavadoc.XJavaDoc.getSourceClasses(XJavaDoc.java:323)
 
        at xdoclet.tagshandler.AbstractProgramElementTagsHandler.getAllClasses(AbstractProgramElementTagsHandler.java:95)
 
        at xdoclet.tagshandler.ClassTagsHandler.forAllClasses(ClassTagsHandler.java:339)
 
        ... 51 more