the exception is

code: 


javax.faces.FacesException: javax.servlet.ServletException: 
java.lang.NoSuchMethodError: 
org.apache.myfaces.taglib.html.HtmlPanelGridTag.setColumns(Ljava/lang/String;)V
        at 
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:347)
        at 
org.apache.myfaces.application.jsp.JspViewHandlerImpl.buildView(JspViewHandlerImpl.java:486)
        at 
org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:337)
        at 
org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
        at 
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:140)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:155)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at 
org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:301)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
        at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
        at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)
Caused by: org.apache.jasper.JasperException: javax.servlet.ServletException: 
java.lang.NoSuchMethodError: 
org.apache.myfaces.taglib.html.HtmlPanelGridTag.setColumns(Ljava/lang/String;)V
        at 
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522)
        at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
        at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
        at 
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
        at 
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
        at 
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
        at 
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:341)
        ... 20 more
Caused by: javax.servlet.ServletException: java.lang.NoSuchMethodError: 
org.apache.myfaces.taglib.html.HtmlPanelGridTag.setColumns(Ljava/lang/String;)V
        at 
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:852)
        at 
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
        at org.apache.jsp.helloWorld_jsp._jspService(helloWorld_jsp.java:93)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
        ... 30 more
Caused by: java.lang.NoSuchMethodError: 
org.apache.myfaces.taglib.html.HtmlPanelGridTag.setColumns(Ljava/lang/String;)V
        at 
org.apache.jsp.helloWorld_jsp._jspx_meth_h_005fpanelGrid_005f0(helloWorld_jsp.java:176)
        at 
org.apache.jsp.helloWorld_jsp._jspx_meth_h_005fform_005f0(helloWorld_jsp.java:152)
        at 
org.apache.jsp.helloWorld_jsp._jspx_meth_f_005fview_005f0(helloWorld_jsp.java:118)
        at org.apache.jsp.helloWorld_jsp._jspService(helloWorld_jsp.java:83)
        ... 33 more





I just download MyFaces Tomahawk 1.1.7 Examples 
http://www.apache.org/dyn/closer.cgi/myfaces/binaries/tomahawk-examples-1.1.7-bin.zip
then downlaod MyFaces-core 1.2.5
http://www.apache.org/dyn/closer.cgi/myfaces/source/myfaces-core-1.2.5-src.zip
then download MyFaces Tomahawk 1.1.7 for JSF 1.2
http://www.apache.org/dyn/closer.cgi/myfaces/binaries/tomahawk12-1.1.7-bin.zip
then unzip myfaces-example-blank-1.1.7, unzip MyFaces-core 1.2.5 and place the 
.jar file in myfaces-example-blank-1.1.7 lib folder, then unzip 
tomahawk12-1.1.7-bin.zip and place the .jar file in myfaces-example-blank-1.1.7 
lib folder, then placed the file in tomcat 6.0.18 and deploy, the exception as 
stated above is shown!!

I really want to use jsf 1.2!! 


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