[news.eclipse.birt] ViewerError in WAS - NoClassDefFoundError: org/w3c/t

[assaf.frank@xxxxxxxxxxx (Assaf)]

Hi,

I get this message when running a report in the viewer working with WAS or 
RAD.
I don't get it with tomcat:

java.lang.NoClassDefFoundError: org/w3c/tidy/Tidy
  at org.eclipse.birt.report.engine.parser.HTMLTextParser.<init>  
  (HTMLTextParser.java:54)

What I found from previous questions is that the error is caused due to 
insufficient permissions of the server (they are only read and need to be 
set to read-write).. is this true ?
What if the application is installed at end users who don't allow this 
policy?

I tried coping the tidy.jar from the 
org.eclipse.birt.report.engine_2.2.2.r22x_v20080107.zip
to other places in the classpath but this doesn't work contantly 
(sometimes I does work and sometimes it doesn't)..

Anyone got any idea ?

Thanks