Help Please!

BACKGROUND
==========
Our struts web app works fine on our local (not on the
internet) Tomcat server, but when we deploy it on the
web based Tomcat server of our hosting company, we get
the error below, when we attempt to connect to the
application.  


Can anyone please tell me what may be causing this -
java.lang.NullPointerException.  More importantly,
what can we do to get round this error?

Running in debug mode is not an option since the app
is deployed on our hosting company's server.

Thank you.

Dele Oke




ERROR MSG
=========
org.apache.jasper.JasperException

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)

javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

java.lang.NullPointerException

org.apache.struts.taglib.TagUtils.pageURL(TagUtils.java:1056)

org.apache.struts.taglib.TagUtils.computeURLWithCharEncoding(TagUtils.java:448)

org.apache.struts.taglib.html.RewriteTag.doStartTag(RewriteTag.java:55)

org.apache.jsp.index_jsp._jspx_meth_html_rewrite_0(org.apache.jsp.index_jsp:122)

org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:73)

org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)

javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)

javax.servlet.http.HttpServlet.service(HttpServlet.java:802)



                
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