I am sorry to say that neither of the two proposed solutions worked.
First I tried to copy the jar -> same error
Then I tried to remove the environment vars (ant_home and Ant-path) -> same 
error.
When finally generating the war and trying to deploy it (by setting the 
"context" and endorsed parameters in CATALINA_OPTS) I found that the jar-file 
"krysalis-jCharts-1.0.0-alpha-1.jar" was not copied to the 
"WEB-INF\lib"-directory (and not present in the jar). I am using the 
Chart-plugin.
After placing the war-file in the "webapps"-directory, letting tomcat expand it 
and manually copying the "Charts"-jar into the lib-directory (I am now trying 
to run it as an installed web-app) I finally got:
"Message: null
Description: No details available.
Sender: org.apache.cocoon.servlet.CocoonServlet
Source: Cocoon Servlet
Request URI
index.html
cause
null
request-uri
/sdfii/index.html"
when trying to start the application.
I am using Tomcat 4.1.24 by the way.

I will let this rest for a while while trying to figure out something or other 
but thanks anyway.
If I find a solution I will post it here.

Regards Lars

-----Ursprungligt meddelande-----
Från: David Crossley [mailto:[EMAIL PROTECTED] 
Skickat: den 3 mars 2006 08:53
Till: user@forrest.apache.org
Ämne: Re: SV: UnknownHostException

David Crossley wrote:
> [EMAIL PROTECTED] wrote:
> > There is another ant on the system but when running forrest I can see:
> 
> Try copying $FORREST_HOME/lib/core/xml-commons-resolver-1.1.jar
> to $ANT_HOME/

I meant to $ANT_HOME/lib directory.

> If it still doesn't work, then try unsetting $ANT_HOME and
> remove $ANT_HOME/bin from your path.

-David