How to print values using nested:iterate tag

[Mad Shop <jm...@yahoo.com>]

I have following scenario.
   
       I have getExSummary() method in exForm which returns a arraylist
 of A object.  How to use logic:iterate tag to print all the values
 which methods in A object.
  getACount(),getBCount() are methods in A object.
   
      I tried following tag, which is not working.  Please suggest me
 the correct nested:iterate tag.
   <table>
  <nested:notEmpty name ="exForm" property="exSummary">
  <nested:iterate name ="exForm" property="exSummary" id="e" indexId="edx">
  <tr>
  <td>
  <nested:write property="aCount" />
  </td>
  <td>
  <nested:write property="bCount" />
  </td>
  </tr>
  </nested:iterate>
  </nested:notEmpty>
  </table>
   
  Error which I am getting
   
  <Aug 9, 2007 3:52:43 PM IST> <Error> <HTTP> <BEA-101020>
 <[weblogic.servlet.inte
rnal.WebAppServletContext@3bbd4e - appName: 'AAA', name: 'aaa',
 context-path: '/
eem'] Servlet failed with Exception
java.lang.NullPointerException
        at weblogic.logging.commons.LogImpl.doLog(LogImpl.java:95)
        at weblogic.logging.commons.LogImpl.debug(LogImpl.java:59)
        at weblogic.logging.commons.LogImpl.debug(LogImpl.java:55)
        at
 org.apache.struts.taglib.TagUtils.message(TagUtils.java:1036)
        at org.apache.struts.taglib.TagUtils.message(TagUtils.java:999)
        Truncated. see log file for complete stacktrace
>

       
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