JBoss 4.2.2.GA on Windows XP, JBoss-aop-2.1.3 I've run build.xml under jboss-40-install/jboss-aop-jdk50.deployer to substitue jboss-aop-2.1.3 I think I've made all the changes in the instructions for Load-time weaving. Made changes in run.bat for -javaagent:pluggable-instrumentor.jar Copied pluggable-instrumentor.jar to %JBOSS_HOME%\bin Ran the ant task deploy-basic-lt-war-in-jar After I "run -c all" and go to http://localhost:8080/aopexample/index.jsp, I get ClassNotFoundException: org.jboss.injbossaop.lib.ExampleValue. But I can see the above class in aopexamplelib.aop inside aopexample.jar. I'd appreciate any help to get me going on AOP development. I also see following snippets in stack-trace: 22:50:33,687 ERROR [Instrumentor] [warn] AOP Instrumentor failed to transform org.jboss.injbossaop.lib.ExampleValue java.lang.RuntimeException: org.jboss.injbossaop.lib.ExampleValue$ExampleValueAdvisor: frozen class (cannot edit) at javassist.ClassPool.checkNotFrozen(ClassPool.java:568) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4247415#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...