I really don't understand why I keep getting the following error at runtime org.jboss.util.NotImplementedException: Use getFieldWriteInfos | at org.jboss.aop.ClassAdvisor.getFieldWriteInterceptors(ClassAdvisor.java:243) | Basically when I have my project compile and run with ant build everything works fine (I use JbossCache and a couple of aspectized class in being used). The thing is that if I compile it and then uses apoc (aop compiler of JbossAOP) to aspectize the class and then run in Eclipse by running the main class then the error above would happen. So what does NotImplementedException mean? that function was supposed to be in jboss-aop.jar i guess. I don't think it is the jboss-aop.xml's problem as well cause with the ant build and run, it works fine View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048997#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...