Your missing the jbosssx-client.jar from your classpath. Its in the jboss dist client directory. ----- Original Message ----- From: Andrew Tan To: [EMAIL PROTECTED] Sent: Friday, March 23, 2001 10:37 AM Subject: [JBoss-user] NoClassDefFoundError: org/jboss/security/SecurityAssociation Hi, I have a problem when I tried to run a client to access the EJB. It managed to get a reference to this EJB object, but when it tried called home.create() this error came up. I am using: Jboss2.1 Windows 2000 JDK1.3 If anyone can help me solve it problem, I would be grateful. Regards, Andrew T. ------------------------------- The error looks like this: Exception in thread "main" java.lang.NoClassDefFoundError: org/jboss/security/SecurityAssociation at org.jboss.ejb.plugins.jrmp.interfaces.GenericProxy.getPrincipal(GenericProxy.java:184) at org.jboss.ejb.plugins.jrmp.interfaces.HomeProxy.invoke(HomeProxy.java:231) at $Proxy0.create(Unknown Source) at InterestClient.main(InterestClient.java:51) line 51 is ---> Interest interest = home.create(); // where Interest is the EJB Bean _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user