Hello Hozawa, thanks for your response. I should mention that I dicovered that upgrading Tomcat from version 7 to 8 fixed the exception I posted and it looks like I can generate a JasperReport ok. So I'm wondering if there's a listing for which features do and do not work on Java 8. Is there a way I could see a listing of which unit tests pass/fail when TIBCO runs this JasperReports on java 8?