La aplicación ha causado un error

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					javax.servlet.jsp.JspException: Error - tag useAttribute : no tiles context found.
	at org.apache.struts.taglib.tiles.UseAttributeTag.doStartTag(UseAttributeTag.java:176)
	at jsp_servlet.__layoutiyc._jspService(__layoutiyc.java:277)
	at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
	at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1077)
	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:465)
	at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
	at es.aemps.sgm.reloadable.resource.util.SimpleLocaleFilter.doFilter(SimpleLocaleFilter.java:104)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
	at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
	at es.aemps.iyc.filters.X509Filter.doFilter(X509Filter.java:68)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
	at es.aemps.nucleo.filters.SecurityFilter.doFilter(SecurityFilter.java:163)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:7053)
	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
	at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3902)
	at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2773)
	at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
	at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)