title: Exception in thread "main" java.lang.NullPointerException (eclipse)
body: <p>my code is : </p>
  
  <pre><code>import ir.sbu.nlp.wordnet.data.model.FNSense;
  import ir.sbu.nlp.wordnet.data.model.FNSynset;
  import ir.sbu.nlp.wordnet.data.model.FNSynsetsRelation;
  import ir.sbu.nlp.wordnet.service.FNSynsetService;
  import java.util.Vector;
  public class sample2 {
  public static void main(String[] args) {
          FNSynsetService service=new FNSynsetService();
          service.findAll();
         }
  }
  </code></pre>
  
  <p>and when I run it display this error</p>
  
  <blockquote>
  <pre><code>   Data Load Started...
     Exception in thread "main" java.lang.NullPointerException
     at ir.sbu.nlp.wordnet.data.dao.FNWordDao.getTextNode(FNWordDao.java:513)
     at ir.sbu.nlp.wordnet.data.dao.FNWordDao.loadWords(FNWordDao.java:438)
     at ir.sbu.nlp.wordnet.data.dao.FNWordDao.&lt;init&gt;(FNWordDao.java:76)
     at ir.sbu.nlp.wordnet.data.dao.FNDaoManager.&lt;init&gt;(FNDaoManager.java:25)
     at ir.sbu.nlp.wordnet.data.dao.FNDaoManager.getInstance(FNDaoManager.java:40)
     at ir.sbu.nlp.wordnet.service.FNSynsetService.&lt;init&gt;(FNSynsetService.java:51)
     at sample2.main(sample2.java:12)
  </code></pre>
  </blockquote>
  
  <p>Can every one help me?
  I copy every file needed for installation</p>