hi, i'm trying to forward from index.jsp: <jsp:forward page="main.jsf"/>
to main.jsp: <%@ taglib uri="http://tiles.apache.org/tags-tiles" prefix="tiles" %> <tiles:insertDefinition name=".mainLayout"> <tiles:putAttribute name="title" value="Main Page"/> <tiles:putAttribute name="body" value="/tiles/main.jsp"/> </tiles:insertDefinition> this is part of tiles.xml: <!DOCTYPE tiles-definitions PUBLIC "-//Apache Software Foundation//DTD Tiles Configuration 2.0//EN" "http://tiles.apache.org/dtds/tiles-config_2_0.dtd"> <tiles-definitions> <definition name=".mainLayout" template="/layout.jsp"> <put-attribute name="header" value="/tiles/header.jsp"/> part of web.xml: <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <context-param> <param-name>org.apache.tiles.CONTEXT_FACTORY</param-name> <param-value>org.apache.tiles.context.enhanced.EnhancedContextFactory</ param-value> </context-param> <servlet> <servlet-name>Tiles Servlet</servlet-name> <servlet-class>org.apache.tiles.web.startup.TilesServlet</servlet-class> <init-param> <param-name>definitions-config</param-name> <param-value>/WEB-INF/tiles-defs.xml,/org/apache/tiles/classpath-defs.xml</ param-value> </init-param> <load-on-startup>2</load-on-startup> </servlet> <listener> <listener-class>org.apache.tiles.web.startup.TilesListener</listener-class> </listener> The excpetion is: java.lang.NoSuchMethodError: javax.servlet.jsp.tagext.TagAttributeInfo .<init>(Ljava/lang/String;ZLjava/lang/String;ZZ)V at org.apache.jasper.compiler.TagLibraryInfoImpl.createAttribute( TagLibraryInfoImpl.java:581) jar included: aopalliance.jar cglib-2.0-rc2.jar commons-beanutils.jar commons-collections-2.1.jar commons-dbcp-1.1.jar commons-digester.jar commons-fileupload-1.0.jar commons-logging.jar commons-pool-1.1.jar dom4j-1.4.jar hibernate2.jar jsf-api.jar jsf-impl.jar jstl-1.1.0.jar jta.jar log4j.jar mysql-connector-java-3.0.9-stable-bin.jar odmg-3.0.jar spring.jar standard.jar tiles-api-2.0.5.jar tiles-core-2.0.5.jar tiles-jsp-2.0.5.jar this is an advance topic. any idea will be welcome!