I have created using my own classes in GUtil.jar. When testing in IReport, I have included the Classpath to it and created a variable to called a method within the external jar. It works perfectly. However when I deployed to my web application, somehow jasperreport engine throws an error saying, 'No such property: GUtil for class...'. I have already set the Windows variable Classpath. Already browsed the forum, but no postings on external jar. Appreciate any help.