The version is 1.1, am using the aop packaged with JBoss 4.0.2. Excerpt from the MANIFEST file === Manifest-Version: 1.0 Ant-Version: Apache Ant 1.6.2 Created-By: 1.4.2_06-b03 (Sun Microsystems Inc.) Specification-Title: JBoss AOP Aspect Library Specification-Version: jboss-aspect-library-1.1 Specification-Vendor: JBoss (http://www.jboss.org/) Implementation-Title: JBoss AOP Aspect Library Implementation-URL: http://www.jboss.org/ Implementation-Version: jboss-aspect-library-1.1 Implementation-Vendor: JBoss.org Implementation-Vendor-Id: http://www.jboss.org/ === -thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4047953#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...