I saw some messages posted about this issue, which I think I may understand, so I thought I'd post my experiences. I was getting this jsp exception when trying to use <bean:write> inside <logic:iterate>. The code looked fine. Turns out I was missing the taglib include for the logic library! After adding
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
to my JSP, my iterate and write statements worked fine.
Hopefully anyone who's been having trouble with this will find that this was their problem as well. Good luck!
-joachim

