lucene date range query to search files

i want to search files created between two dates and i am getting an error,plz help me anyone

Code:

---

                Term begin = new Term("date","20130101");
                Term end = new Term("date","20130225");
                Query query = new RangeQuery(begin, end, true);
               
                /* First parameter is the query to be executed and
                  second parameter indicates the no of search results to fetch */
                  TopDocs topDocs = indexSearcher.search(query,3);       
                  System.out.println("Total hits "+topDocs.totalHits);

                  // Get an array of references to matched documents
                  ScoreDoc[] scoreDosArray = topDocs.scoreDocs;       
                  for(ScoreDoc scoredoc: scoreDosArray){
                      //Retrieve the matched document and show relevant details
                      Document doc = indexSearcher.doc(scoredoc.doc);
                      System.out.println("\nSender: "+doc.getField("sender").stringValue());
                      System.out.println("Subject: "+doc.getField("subject").stringValue());
                      System.out.println("Email file location: "
                                                        +doc.getField("emailDoc").stringValue());       
                  }

---

Error:for the above code i am getting below error

Code:

---

at org.apache.lucene.search.IndexSearcher.rewrite(IndexSearcher.java:616)
        at org.apache.lucene.search.IndexSearcher.createNormalizedWeight(IndexSearcher.java:663)
        at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:281)
        at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:269)
        at verinon.tech.RangeSearch.main(RangeSearch.java:37)

---