Error message - servlet.jar ?

can anyone tell me what this error message means. Ive installed a .war file that should work. but i get this error. Is it something to do with not being able to find servlet.jar ? if it is where do i need to put it?
Thanks
exception
org.apache.jasper.JasperException
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.lang.NullPointerException
     org.apache.jsp.products_jsp._jspService(org.apache.jsp.products_jsp:72)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:325)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

can anyone tell me what this error message means. Ive
installed a .war file that should work. but i get
this error. Is it something to do with not being able
to find servlet.jar ? if it is where do i need to put
it?
Thanks
exception
org.apache.jasper.JasperException
     org.apache.jasper.servlet.JspServletWrapper.service(J
spServletWrapper.java:373)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(J
spServlet.java:295)
     org.apache.jasper.servlet.JspServlet.service(JspServl
et.java:245)
     javax.servlet.http.HttpServlet.service(HttpServlet.ja
va:802)
root cause
java.lang.NullPointerException
     org.apache.jsp.products_jsp._jspService(org.apache.js
p.products_jsp:72)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJsp
Base.java:99)
     javax.servlet.http.HttpServlet.service(HttpServlet.ja
va:802)
     org.apache.jasper.servlet.JspServletWrapper.service(J
spServletWrapper.java:325)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(J
spServlet.java:295)
     org.apache.jasper.servlet.JspServlet.service(JspServl
et.java:245)
     javax.servlet.http.HttpServlet.service(HttpServlet.ja
va:802)
Pal..pls quote d JSP code....
Hope the forum could get more info regarding your problem, and help u !
Cheers !
Shekhar

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