I am seeing the following error attempting to deploy my WAR file with JBoss 4.0.3 and Java 1.5.0_05: java.lang.VerifyError: (class: mil/navy/ia/nicweb/dos/UserAccessCheckServlet, method: init signature: (Ljavax/servlet/ServletConfig;)V) Incompatible object argument for function call at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2328) I have tried to follow several trails to load the appropriate ServletConfig class. Note that this problem started as we attempted to upgrade from JBoss 3.2.5. We have not made any change to the JVM (build or deployment). Does anyone have any suggestions where to start?? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3975202#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...