Error with custom exception page

[John McTeague <jo...@shortslant.com>]

Im trying to replace the default exception page in tapestry (using
beta-3). To start with, I have taken a copy of the default tapestry pages 
and made a minor change so that I know I can get them working before
making full blown changes to the layout.

I have the following files in the root of my WEB-INF directory:

Exception.page and Exception.css - exact copy of the default tapestry
Exception.page and .css 
Exception.html - Identical except ive replaced the text "An exception has 
occured." with some other text so I know its my page thats being shown.

In my .application file I have the following:

<page name="Exception" specification-path="/WEB-INF/Exception.page"/>

Despite this, everytime the exception page is displayed, I get an
Internal Server Error along the lines of:

500 Internal Server Error

org.apache.tapestry.ApplicationRuntimeException: Unable to instantiate
component Exception: org.apache.tapestry.resource.ContextResourceLocation

	at
org.apache.tapestry.pageload.PageLoader.constructComponent(PageLoader.java:579)

	at org.apache.tapestry.pageload.PageLoader.loadPage(PageLoader.java:806)

	at org.apache.tapestry.pageload.PageSource.getPage(PageSource.java:194)

	at org.apache.tapestry.engine.RequestCycle.getPage(RequestCycle.java:236)

	at
org.apache.tapestry.engine.AbstractEngine.activateExceptionPage(AbstractEn
gine.java:495)

	at org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:954)

	at
org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:238)

	at org.apache.tapestry.ApplicationServlet.doPost(ApplicationServlet.java:367)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

	at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for
J2EE].server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)

	at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:283)

	at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for
J2EE].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher
.java:560)

	at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for
J2EE].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestD
ispatcher.java:306)

	at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for
J2EE].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.jav
a:767)

	at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for
J2EE].server.http.HttpRequestHandler.run(HttpRequestHandler.java:259)

	at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for
J2EE].server.http.HttpRequestHandler.run(HttpRequestHandler.java:106)

	at
EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.
java:797)

	at java.lang.Thread.run(Thread.java:479)

Can anyone explain this?

Thanks.



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