VelocityViewServlet : Error processing a template for path '/viewer/ViewerTemplate.vm'

Unable to find resource 'viewer/PDF.VM'

org.apache.velocity.exception.ResourceNotFoundException: Unable to find resource 'viewer/PDF.VM'
	at org.apache.velocity.runtime.resource.ResourceManagerImpl.loadResource(ResourceManagerImpl.java:483)
	at org.apache.velocity.runtime.resource.ResourceManagerImpl.getResource(ResourceManagerImpl.java:354)
	at org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1400)
	at org.apache.velocity.runtime.directive.Parse.render(Parse.java:198)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336)
	at org.apache.velocity.Template.merge(Template.java:328)
	at org.apache.velocity.Template.merge(Template.java:235)
	at org.apache.velocity.tools.view.servlet.VelocityViewServlet.performMerge(VelocityViewServlet.java:805)
	at org.apache.velocity.tools.view.servlet.VelocityViewServlet.mergeTemplate(VelocityViewServlet.java:762)
	at org.apache.velocity.tools.view.servlet.VelocityViewServlet.doRequest(VelocityViewServlet.java:555)
	at org.apache.velocity.tools.view.servlet.VelocityViewServlet.doGet(VelocityViewServlet.java:509)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
	at jeus.servlet.engine.ServletWrapper.executeServlet(ServletWrapper.java:172)
	at jeus.servlet.engine.RequestDispatcherImpl.processCommonRequestDispatcher(RequestDispatcherImpl.java:537)
	at jeus.servlet.engine.RequestDispatcherImpl.doForward(RequestDispatcherImpl.java:454)
	at jeus.servlet.engine.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:381)
	at solars.ax.core.VelocityServletBase.forward(VelocityServletBase.java:153)
	at solars.ax.core.TemplateServletBase.handleRequest(TemplateServletBase.java:421)
	at solars.ax.core.VelocityServletBase.service(VelocityServletBase.java:207)
	at solars.ax.core.ServletFactory.doService(ServletFactory.java:49)
	at solars.ax.core.ServletFactory.doGet(ServletFactory.java:32)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
	at jeus.servlet.engine.ServletWrapper.executeServlet(ServletWrapper.java:172)
	at jeus.servlet.filter.FilterChainImpl.internalDoFilter(FilterChainImpl.java:112)
	at jeus.servlet.filter.FilterChainImpl.doFilter(FilterChainImpl.java:86)
	at solars.ax.core.filter.XSSFilter.doFilter(XSSFilter.java:41)
	at jeus.servlet.filter.FilterChainImpl.internalDoFilter(FilterChainImpl.java:98)
	at jeus.servlet.filter.FilterChainImpl.doFilter(FilterChainImpl.java:86)
	at jeus.servlet.engine.ServletWrapper.execute(ServletWrapper.java:147)
	at jeus.servlet.engine.RequestProcessor.run(RequestProcessor.java:211)
	at jeus.util.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:1211)
	at jeus.util.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:1261)
	at jeus.servlet.engine.WebThreadPoolExecutor$WebRequestWorker.run(WebThreadPoolExecutor.java:340)
	at java.lang.Thread.run(Thread.java:738)