I am currently using Jboss 4.01 sp1 and I am trying to load a schema and validate it using xerces. However, the app is throwing this exception. java.lang.NoSuchMethodError: org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar([Lorg/apache/xerces/xni/parser/ XMLInputSource;)V at org.apache.xerces.jaxp.validation.XMLSchemaFactory.newSchema(Unknown Source) at javax.xml.validation.SchemaFactory.newSchema(Unknown Source) at javax.xml.validation.SchemaFactory.newSchema(Unknown Source) at com.nielsenmedia.services.util.XMLValidator.(Unknown Source) I posted this before, but I can't seem to find this any more. Any help would be greatly appreciated. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3972388#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...