VAJ 3.5.3 and WTE "cant remove Attributes from request scope"

[Kenneth Petersen]

After finally being able to run the HelloWorld from the Bluestone Software's "Welcome to the Struts Framework" trail, I get the following error message when trying to use ActionMapping as described in step 4 of the same trail:

Message: Server caught unhandled exception from servlet [jsp]: cant remove Attributes from request scope

The full path of the Exception is at the bottom. The Exception is thrown with in the FormTag.doEndTag() method. To be more specific the commands that are not processed succesfully are:
        pageContext.removeAttribute(Constants.BEAN_KEY,
                                           PageContext.REQUEST_SCOPE);
        pageContext.removeAttribute(Constants.FORM_KEY,
                                    PageContext.REQUEST_SCOPE);

Have anyone have simular problems? Any ideas on a solution to the problem would be welcomed.

Regards
KP


Root Error-1: cant remove Attributes from request scope
java.lang.IllegalArgumentException: cant remove Attributes from request scope java.lang.Throwable(java.lang.String) java.lang.Exception(java.lang.String) java.lang.RuntimeException(java.lang.String) java.lang.IllegalArgumentException(java.lang.String) void org.apache.jasper.runtime.PageContextImpl.removeAttribute(java.lang.String, int) int org.apache.struts.taglib.html.FormTag.doEndTag() void _input_xjsp._jspService(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) void org.apache.jasper.runtime.HttpJspBase.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) void javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, boolean) void org.apache.jasper.runtime.JspServlet.serviceJspFile(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.lang.String, java.lang.Throwable, boolean) void org.apache.jasper.runtime.JspServlet.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) void javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.webapp.StrictServletInstance.doService(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.webapp.IdleServletState.service(com.ibm.servlet.engine.webapp.StrictLifecycleServlet, javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.webapp.ServletInstance.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse, com.ibm.servlet.engine.webapp.WebAppServletInvocationEvent) void com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(com.ibm.servlet.engine.webapp.ServletInstanceReference, javax.servlet.ServletRequest, javax.servlet.ServletResponse, com.ibm.servlet.engine.webapp.WebAppServletInvocationEvent) void com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(javax.servlet.ServletRequest, javax.servlet.ServletResponse, com.ibm.servlet.engine.webapp.WebAppServletInvocationEvent) void com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(com.ibm.servlet.engine.webapp.WebAppRequest, javax.servlet.http.HttpServletResponse, boolean) void com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(javax.servlet.ServletRequest, javax.servlet.ServletResponse, boolean) void com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(java.lang.Object) void com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(java.lang.Object) void com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(java.lang.String, com.ibm.servlet.engine.srp.ISRPConnection) void com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(com.ibm.servlet.engine.oselistener.api.IOSEConnection) void com.ibm.servlet.engine.http_transport.HttpTransportHandler.handleConnection(java.net.Socket) void com.ibm.servlet.engine.http_transport.HttpTransportHandler.run() void java.lang.Thread.run()

Wrapped Error-2: cant remove Attributes from request scope
javax.servlet.ServletException: cant remove Attributes from request scope java.lang.Throwable(java.lang.String) java.lang.Exception(java.lang.String) javax.servlet.ServletException(java.lang.Throwable) void org.apache.jasper.runtime.PageContextImpl.handlePageException(java.lang.Exception) void _input_xjsp._jspService(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) void org.apache.jasper.runtime.HttpJspBase.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) void javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, boolean) void org.apache.jasper.runtime.JspServlet.serviceJspFile(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.lang.String, java.lang.Throwable, boolean) void org.apache.jasper.runtime.JspServlet.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) void javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.webapp.StrictServletInstance.doService(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.webapp.IdleServletState.service(com.ibm.servlet.engine.webapp.StrictLifecycleServlet, javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.webapp.ServletInstance.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse, com.ibm.servlet.engine.webapp.WebAppServletInvocationEvent) void com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(com.ibm.servlet.engine.webapp.ServletInstanceReference, javax.servlet.ServletRequest, javax.servlet.ServletResponse, com.ibm.servlet.engine.webapp.WebAppServletInvocationEvent) void com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(javax.servlet.ServletRequest, javax.servlet.ServletResponse, com.ibm.servlet.engine.webapp.WebAppServletInvocationEvent) void com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(com.ibm.servlet.engine.webapp.WebAppRequest, javax.servlet.http.HttpServletResponse, boolean) void com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(javax.servlet.ServletRequest, javax.servlet.ServletResponse, boolean) void com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(java.lang.Object) void com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(java.lang.Object) void com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(java.lang.String, com.ibm.servlet.engine.srp.ISRPConnection) void com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(com.ibm.servlet.engine.oselistener.api.IOSEConnection) void com.ibm.servlet.engine.http_transport.HttpTransportHandler.handleConnection(java.net.Socket) void com.ibm.servlet.engine.http_transport.HttpTransportHandler.run() void java.lang.Thread.run()

Wrapped Error-3: Server caught unhandled exception from servlet [jsp]: cant remove Attributes from request scope
com.ibm.servlet.engine.webapp.UncaughtServletException: Server caught unhandled exception from servlet [jsp]: cant remove Attributes from request scope java.lang.Throwable(java.lang.String) java.lang.Exception(java.lang.String) javax.servlet.ServletException(java.lang.String, java.lang.Throwable) com.ibm.websphere.servlet.error.ServletErrorReport(java.lang.String, java.lang.Throwable) com.ibm.servlet.engine.webapp.WebAppErrorReport(java.lang.String, java.lang.Throwable) com.ibm.servlet.engine.webapp.UncaughtServletException(java.lang.String, java.lang.Throwable) void com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(com.ibm.servlet.engine.webapp.WebAppRequest, javax.servlet.http.HttpServletResponse, boolean) void com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(javax.servlet.ServletRequest, javax.servlet.ServletResponse, boolean) void com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(javax.servlet.ServletRequest, javax.servlet.ServletResponse) void com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(java.lang.Object) void com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(java.lang.Object) void com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(java.lang.String, com.ibm.servlet.engine.srp.ISRPConnection) void com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(com.ibm.servlet.engine.oselistener.api.IOSEConnection) void com.ibm.servlet.engine.http_transport.HttpTransportHandler.handleConnection(java.net.Socket) void com.ibm.servlet.engine.http_transport.HttpTransportHandler.run() void java.lang.Thread.run()