Howto display 404 cause of response on custom error page?

[Per Newgro]

Hi,

i'm looking for a way to display the cause of a 404 send by myself on my custom 
error page.

In a behavior i do
<code>
throw new AbortWithHttpErrorCodeException(HttpServletResponse.SC_NOT_FOUND, 
"Missing subsite in behavior");
</code>

It is displayed in my custom error page

<code>
@MountPath("404.html")
public class PageNotFound extends AbstractErrorPage {

        public PageNotFound() {
                super();
        }

        @Override
        protected void setHeaders(WebResponse response) {
                response.setStatus(HttpServletResponse.SC_NOT_FOUND);
        super.setHeaders(response);
        }
}
</code>

But i wouuld like to display the cause of the 404 to. If i debug i can see the 
cause deep inside the response. But i can't imagine that i have to rebuild the 
path to the cause by myself.

Thanks for helping me
Per

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