title: how can i fix the error in epubcheck 3.01.jar
body: <p>Is there any one knows how to fix the error below. Before I have epubcheck-1.2.jar and it perfectly worked in my program and now i try to incorporate this new epubcheck-3.0.1.jar. I encounter this error. <strong>I am not a java developer</strong>, hope someone can help me here.. I need to upgrade my program because the for epub 2 and epub 3, or there is any one knows an offline validator.</p>
  
  <p>Epubcheck Version 3.0.1</p>
  
  <pre><code>java.lang.NoClassDefFoundError: com/thaiopensource/validate/SchemaReaderFactory
      at com.adobe.epubcheck.ocf.OCFChecker.&lt;clinit&gt;(OCFChecker.java:65)
      at com.adobe.epubcheck.api.EpubCheck.validate(EpubCheck.java:205)
      at com.adobe.epubcheck.tool.Checker.validateFile(Checker.java:172)
      at com.adobe.epubcheck.tool.Checker.run(Checker.java:255)
      at com.adobe.epubcheck.tool.Checker.main(Checker.java:182)
  Caused by: java.lang.ClassNotFoundException: com.thaiopensource.validate.SchemaReaderFactory
      at java.net.URLClassLoader.findClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
      at java.lang.ClassLoader.loadClass(Unknown Source)
      ... 5 more
  </code></pre>