title: Tsung : config error, aborting
body: <p>I am getting this error when i run Tsung</p>
  
  <pre><code>Config Error, aborting ! {undef,
                           [{xmerl_scan,file,
                                ["/root/.tsung/tsung.xml",
                                 [{fetch_path,["/usr/share/tsung/","./"]},
                                  {validation,true}]]},
                            {ts_config,read,2},
                            {ts_config_server,handle_call,3},
                            {gen_server,handle_msg,5},
                            {proc_lib,init_p_do_apply,3}]}
  </code></pre>
  
  <p>Does that means <code>xmerl_scan</code> function definition is missing?</p>
  
  <p>How to fix this?</p>
  
  <p>Thanks.</p>