This same question and answer appeared on the otn.oracle.com Oracle9iAS J2EE forum. Here is an answer for OC4J; maybe it works on Orion too?
In oc4j, you need to edit global-web-application.xml and add <init-param> element in servlet calle "jsp". <init-param> <param-name>javacmd</param-name> <param-value>/your-jdk-1.4-java-home/javac</param-value> </init-param> Best Regards, Brian
