I have logic tag in jsp file

while accessing it getting null pointer exception. pasted the stack trace. all the struts mapping are fine. would some body help what is missing..

ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/myproject].[action]] Servlet.service() for servlet action threw exception

java.lang.NullPointerException

ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/myproject].[action]] Servlet.service() for servlet action threw exception

java.lang.NullPointerException

ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].
[localhost].[/myproject].[jsp]] Servlet.service() for
servlet jsp threw exception

javax.servlet.jsp.JspException: Exception forwarding for name MyForm: javax.servlet.ServletException

at
org.apache.struts.taglib.logic.ForwardTag.doForward(ForwardTag.java:125)

at
org.apache.struts.taglib.logic.ForwardTag.doEndTag(ForwardTag.java:105)

at
org.apache.jsp.check_jsp._jspx_meth_logic_forward_0(check_jsp.java:86)

at
org.apache.jsp.check_jsp._jspService(check_jsp.java:61)

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

at
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)

at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)

at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)

at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)

at
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)

at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)

at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)

at web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)

...