Hi PeterJ Appologies for the delayed reply. In Eclipse, In the Package Explorer, when you expand your project there should be an entry for "JRE System Library" with a version in brackets behind it. What is that version? I checked it. It is the same version 1.5.0_07 %java_home%\bin\javap -verbose -classpath xxx com.demo.hello.HelloBeanBean where xxx is the base directory into which Eclipse is compiling the classes. Post the output. Here is the output Compiled from "HelloBeanBean.java" public class com.demo.hello.HelloBeanBean extends java.lang.Object implements com.demo.hello.HelloBean SourceFile: "HelloBeanBean.java" RuntimeVisibleAnnotations: length = 0xB 00 01 00 22 00 01 00 23 73 00 24 minor version: 0 major version: 50 Constant pool: const #1 = class #2; // com/demo/hello/HelloBeanBean const #2 = Asciz com/demo/hello/HelloBeanBean; const #3 = class #4; // java/lang/Object const #4 = Asciz java/lang/Object; const #5 = class #6; // com/demo/hello/HelloBean const #6 = Asciz com/demo/hello/HelloBean; const #7 = Asciz ; const #8 = Asciz ()V; const #9 = Asciz Code; const #10 = Method #3.#11; // java/lang/Object."":()V const #11 = NameAndType #7:#8;// "":()V const #12 = Asciz LineNumberTable; const #13 = Asciz LocalVariableTable; const #14 = Asciz this; const #15 = Asciz Lcom/demo/hello/HelloBeanBean;; const #16 = Asciz hello; const #17 = Field #18.#20; // java/lang/System.out:Ljava/io/PrintStream; const #18 = class #19; // java/lang/System const #19 = Asciz java/lang/System; const #20 = NameAndType #21:#22;// out:Ljava/io/PrintStream; const #21 = Asciz out; const #22 = Asciz Ljava/io/PrintStream;; const #23 = String #24; // Hello const #24 = Asciz Hello; const #25 = Method #26.#28; // java/io/PrintStream.println:(Ljava/lang/String;)V const #26 = class #27; // java/io/PrintStream const #27 = Asciz java/io/PrintStream; const #28 = NameAndType #29:#30;// println:(Ljava/lang/String;)V const #29 = Asciz println; const #30 = Asciz (Ljava/lang/String;)V; const #31 = Asciz SourceFile; const #32 = Asciz HelloBeanBean.java; const #33 = Asciz RuntimeVisibleAnnotations; const #34 = Asciz Ljavax/ejb/Stateless;; const #35 = Asciz name; const #36 = Asciz HelloBeanBean; { public com.demo.hello.HelloBeanBean(); Code: Stack=1, Locals=1, Args_size=1 0: aload_0 1: invokespecial #10; //Method java/lang/Object."":()V 4: return LineNumberTable: line 7: 0 LocalVariableTable: Start Length Slot Name Signature 0 5 0 this Lcom/demo/hello/HelloBeanBean; public void hello(); Code: Stack=2, Locals=1, Args_size=1 0: getstatic #17; //Field java/lang/System.out:Ljava/io/PrintStream; 3: ldc #23; //String Hello 5: invokevirtual #25; //Method java/io/PrintStream.println:(Ljava/lang/String;)V 8: return LineNumberTable: line 11: 0 line 13: 8 LocalVariableTable: Start Length Slot Name Signature 0 9 0 this Lcom/demo/hello/HelloBeanBean; } View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4173429#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...