Hi, I recently switched over from using Axis to wstools for my webservice. A C# client connects to the JBoss WS. The Web Service starts up fine but when I attempt to call any method from the C# GUI I get the following exception: EJBException in method: public abstract boolean com.systemejb.MyManagementEndPoint.MyMethod(java.lang.String) throws java.rmi.RemoteException, causedBy: java.lang.reflect.UndeclaredThrowableException at org.jboss.ejb.plugins.AbstractInstancePool.get(AbstractInstancePool.java:204) According to the logger this is caused by: java.lang.StackOverflowError at org.apache.log4j.CategoryKey.equals(CategoryKey.java:33) at java.util.Hashtable.get(Hashtable.java:339) at org.apache.log4j.Hierarchy.getLogger(Hierarchy.java:259) at org.apache.log4j.Hierarchy.getLogger(Hierarchy.java:233) at org.apache.log4j.LogManager.getLogger(LogManager.java:179) at org.apache.log4j.Logger.getLogger(Logger.java:94) When I run wstools in my ant script I also get the following warnings: wstools: [wstools] log4j:WARN No appenders could be found for logger (org.jboss.ws.tools.WSTools). [wstools] log4j:WARN Please initialize the log4j system properly. I have checked the log4j.xml file and the appenders are enabled. I am unsure whether the issues are related. If anyone could help shed some light on these issues I'd appreciate it. Thanks MC View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3992306#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...