java.lang.NoClassDefFoundError: org/iso_relax/verifier/VerifierConfigurationException
   at com.thaiopensource.validate.jarv.JarvSchemaReaderFactory.createSchemaReader(JarvSchemaReaderFactory.java:0)
   at com.thaiopensource.validate.SchemaReaderLoader.createSchemaReader(SchemaReaderLoader.java:0)
   at com.thaiopensource.validate.auto.SchemaReaderFactorySchemaReceiverFactory.createSchemaReceiver(SchemaReaderFactorySchemaReceiverFactory.java:0)
   at com.thaiopensource.validate.auto.SchemaReceiverLoader.createSchemaReceiver(SchemaReceiverLoader.java:0)
   at com.thaiopensource.validate.auto.AutoSchemaReceiver$Handler.startElement(AutoSchemaReceiver.java:0)
   at nu.validator.gnu.xml.aelfred2.SAXDriver.startElement(SAXDriver.java:1021)
   at nu.validator.gnu.xml.aelfred2.XmlParser.parseElement(XmlParser.java:1327)
   at nu.validator.gnu.xml.aelfred2.XmlParser.parseDocument(XmlParser.java:617)
   at nu.validator.gnu.xml.aelfred2.XmlParser.doParse(XmlParser.java:512)
   at nu.validator.gnu.xml.aelfred2.SAXDriver.parse(SAXDriver.java:425)
   at com.thaiopensource.validate.auto.AutoSchemaReader.createSchema(AutoSchemaReader.java:0)
   at com.thaiopensource.validate.AbstractSchemaReader.createSchema(AbstractSchemaReader.java:0)
   at org.netbeans.modules.html.validation.ValidationTransaction.schemaByUrl(ValidationTransaction.java:1006)
   at org.netbeans.modules.html.validation.ValidationTransaction.initialize(ValidationTransaction.java:364)
   at org.netbeans.modules.html.validation.ValidationTransaction.<init>(ValidationTransaction.java:443)
   at org.netbeans.modules.html.validation.ValidationTransaction.create(ValidationTransaction.java:212)
   at org.netbeans.modules.html.validation.ValidatorImpl.validate(ValidatorImpl.java:66)
   at org.netbeans.modules.html.editor.api.gsf.HtmlParserResult.getValidationResults(HtmlParserResult.java:255)
   at org.netbeans.modules.html.editor.api.gsf.HtmlParserResult.getDiagnostics(HtmlParserResult.java:236)
   at org.netbeans.modules.csl.core.TLIndexerFactory$TLIndexer.index(TLIndexerFactory.java:237)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$3.run(Indexable.java:208)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:251)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:206)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.run(RepositoryUpdater.java:1948)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.run(RepositoryUpdater.java:1963)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:154)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:138)
   at org.netbeans.modules.parsing.impl.TaskProcessor$1.call(TaskProcessor.java:199)
   at org.netbeans.modules.parsing.impl.TaskProcessor$1.call(TaskProcessor.java:196)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:167)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:323)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:66)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:196)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.indexEmbedding(RepositoryUpdater.java:1916)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:1762)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$1200(RepositoryUpdater.java:1448)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:1628)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:1626)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:454)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:1626)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:1994)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:2175)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:2042)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:3644)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:3583)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:595)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
   at java.util.concurrent.FutureTask.run(FutureTask.java:138)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
   at java.lang.Thread.run(Thread.java:680)