VelocityViewServlet : Error processing the template

Unable to find resource '/tpl/staticpage/cat/521.html'
org.apache.velocity.exception.ResourceNotFoundException: Unable to find resource '/tpl/staticpage/cat/521.html'
	at org.apache.velocity.runtime.resource.ResourceManagerImpl.loadResource(ResourceManagerImpl.java:501)
	at org.apache.velocity.runtime.resource.ResourceManagerImpl.getResource(ResourceManagerImpl.java:384)
	at org.apache.velocity.runtime.RuntimeInstance.getContent(RuntimeInstance.java:851)
	at org.apache.velocity.runtime.directive.Include.renderOutput(Include.java:247)
	at org.apache.velocity.runtime.directive.Include.render(Include.java:174)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:153)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:271)
	at org.apache.velocity.Template.merge(Template.java:296)
	at org.apache.velocity.tools.view.servlet.VelocityLayoutServlet.mergeTemplate(Unknown Source)
	at org.apache.velocity.tools.view.servlet.VelocityViewServlet.doRequest(Unknown Source)
	at org.apache.velocity.tools.view.servlet.VelocityViewServlet.doGet(Unknown Source)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:659)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:457)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:395)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311)
	at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
	at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1197)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:415)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at com.ddim.order.session.CartFilter.doFilter(CartFilter.java:25)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at com.feec.filter.PerformanceFilter.doFilter(PerformanceFilter.java:58)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at com.du.system.RequestFilter.doFilter(RequestFilter.java:58)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at com.du.system.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:581)
	at com.du.system.BadInputFilterValve.invoke(BadInputFilterValve.java:360)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:775)
	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:704)
	at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:897)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
	at java.lang.Thread.run(Thread.java:745)