Hi, I have a strange error when I try to use a DatatSource with JNDI in JBoss 5.0.0.GA, 5.0.1.GA or 5.1.0.Beta1 but not with JBoss 4.2.2 with JRE 1.6 ... | 11:29:19,223 INFO [ConnectionFactoryBindingService] Bound ConnectionManager 'jboss.jca:service=ConnectionFactoryBinding,name=JmsXA' to JNDI name 'java:JmsXA' | 11:29:19,317 INFO [ConnectionFactoryBindingService] Bound ConnectionManager 'jboss.jca:service=DataSourceBinding,name=jdbc/MyDatasource' to JNDI name 'java:jdbc/MyDatasource' | ... | javax.naming.NoInitialContextException: Cannot instantiate class: org.jnp.interfaces.NamingContextFactory. Root exception is | java.lang.ClassCastException: org.jnp.interfaces.NamingContextFactory cannot be cast to javax.naming.spi.InitialContextFactory | at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:659) | at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:250) | at javax.naming.InitialContext.init(InitialContext.java:226) | at javax.naming.InitialContext.<init>(InitialContext.java:182) | at com.MyPackage.MyClass.MyFunction(MyClass.java:xxx) and it's nearly with JDK 1.5 ... | 11:29:19,223 INFO [ConnectionFactoryBindingService] Bound ConnectionManager 'jboss.jca:service=ConnectionFactoryBinding,name=JmsXA' to JNDI name 'java:JmsXA' | 11:29:19,317 INFO [ConnectionFactoryBindingService] Bound ConnectionManager 'jboss.jca:service=DataSourceBinding,name=jdbc/MyDatasource' to JNDI name 'java:jdbc/MyDatasource' | ... | javax.naming.NoInitialContextException: Cannot instantiate class: org.jnp.interfaces.NamingContextFactory. Root exception is | java.lang.ClassCastException: org.jnp.interfaces.NamingContextFactory | at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:659) | at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:250) | at javax.naming.InitialContext.init(InitialContext.java:226) | at javax.naming.InitialContext.<init>(InitialContext.java:182) | at com.MyPackage.MyClass.MyFunction(MyClass.java:xxx) In MyFunction, the error appear on Context initCtx = new InitialContext(); I use de default serveur and I have copyed then edited mssql-ds.xml in server\default\deploy I have Windows XP SP3. I don't understand what can be my mistake because the error seem be in JBoss source. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4222942#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...