Hi! I made use of Xalan-Java 1.2.2 from xml.apache.org (I needed to use it to process XPath expression) in my J2EE application running in Allaire JRun and it worked well, but when I migrated the application to WebSphere Application Server 4.0, it returned an error "Class org/w3c/dom/Node violates loader constraints" . How do I solve this? It seems that it is associated with the Xalan-Java 1.2.2 package (jar files) because everytime I remove the XPath part which uses the Xalan-Java package, I don't get the error anymore. It's weird because it runs in JRun but in WAS 4.0, it doesn't. Thanks!