> error message: "ISO-8859-1" error stack trace:
> java.nio.charset.IllegalCharsetNameException: "ISO-8859-1"
>         at java.nio.charset.Charset.checkName(Charset.java:305)
>         at java.nio.charset.Charset.lookup(Charset.java:439)
>         at java.nio.charset.Charset.forName(Charset.java(Inlined Compiled Code))
> 
>         at java.lang.StringCoding$DecoderCache.makeDecoder(StringCoding.java(Com
> piled Code))
>         at java.lang.StringCoding$1.run(StringCoding.java(Compiled Code))
>         at java.security.AccessController.doPrivileged1(Native Method)
>         at java.security.AccessController.doPrivileged(AccessController.java(Com
> piled Code))
>         at java.lang.StringCoding$DecoderCache.getDecoder(StringCoding.java(Comp
> iled Code))
>         at java.lang.StringCoding.getDecoder(StringCoding.java(Inlined Compiled Code))
>         at java.lang.StringCoding.decode(StringCoding.java(Compiled Code))
>         at java.lang.String.<init>(String.java(Compiled Code))
>         at java.lang.String.<init>(String.java(Inlined Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.RequestUtils.parsePostData(RequestUti
> ls.java(Compiled Code))
>         at com.ibm.ws.webcontainer.srt.SRTServletRequest.parseParameters(SRTServ
> letRequest.java(Compiled Code))
>         at com.ibm.ws.webcontainer.srt.SRTServletRequest.getParameterNames(SRTSe
> rvletRequest.java(Compiled Code))
>         at javax.servlet.ServletRequestWrapper.getParameterNames(ServletRequestW
> rapper.java(Compiled Code))
>         at org.apache.struts.util.RequestUtils.populate(RequestUtils.java(Compil
> ed Code))
>         at org.apache.struts.action.RequestProcessor.processPopulate(RequestProc
> essor.java(Compiled Code))
>         at org.apache.struts.action.RequestProcessor.process(RequestProcessor.ja
> va(Compiled Code))
>         at org.apache.struts.action.ActionServlet.process(ActionServlet.java(Inl
> ined Compiled Code))
>         at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java(Comp
> iled Code))
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code
> ))
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code
> ))
>         at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(Stric
> tServletInstance.java(Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(Stric
> tLifecycleServlet.java(Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecy
> cleServlet.java(Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(Strict
> LifecycleServlet.java(Inlined Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstan
> ce.java(Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(V
> alidServletReferenceState.java(Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(Ser
> vletInstanceReference.java(Inlined Compiled Code))
>         at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilte
> rChain.java(Compiled Code))
>         at com.infostream.web.filters.HibernateSessionFilter.doFilter(HibernateS
> essionFilter.java(Compiled Code))
>         at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterI
> nstanceWrapper.java(Compiled Code))
>         at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilte
> rChain.java(Compiled Code))
>         at com.infostream.web.filters.IdentificationFilter.doFilter(Identificati
> onFilter.java(Compiled Code))
>         at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterI
> nstanceWrapper.java(Compiled Code))
>         at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilte
> rChain.java(Compiled Code))
>         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDi
> spatch(WebAppRequestDispatcher.java(Compiled Code))
>         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAp
> pRequestDispatcher.java(Compiled Code))
>         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebApp
> RequestDispatcher.java(Compiled Code))
>         at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.jav
> a(Compiled Code))
>         at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebApp
> Invoker.java(Compiled Code))
>         at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvoc
> ation(CachedInvocation.java(Compiled Code))
>         at com.ibm.ws.webcontainer.cache.invocation.CacheableInvocationContext.i
> nvoke(CacheableInvocationContext.java(Compiled Code))
>         at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(Ser
> vletRequestProcessor.java(Compiled Code))
>         at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSE
> Listener.java(Compiled Code))
>         at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnect
> ion.java(Compiled Code))
>         at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.ja
> va(Compiled Code))
>         at com.ibm.ws.http.HttpConnection.run(HttpConnection.java(Compiled Code)
> )
>         at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Compiled Code))

##</code><code>##

    #!/usr/bin/perl -w
      
    use WWW::Scripter;
    
    my $urlLogin = "XXX";
    	
    my $viper = WWW::Scripter->new();
    		
    $viper->use_plugin('JavaScript');
    
    $viper->get($urlLogin);
          
    $viper->form_name('loginForm');
          
    $viper->field(username => "xxx");
    $viper->field(password => "xxx");
    
    $viper->click();