title: SPWeb.lists[] List does not exist
body: <p>I am running my code under administrative rights that iterates over different site->spweb to check the existance of a list. Strangely and <strong>for some site</strong> the code returns me that list does not exists(exception : List does not exists) Yet i can totally browse the list from browser on the same web
  what am i missing here ?
  EDIT:Adding Code</p>
  
  <pre><code>                    foreach (SPSite s in webApp.Sites)
                      {
                          foreach (SPWeb w in s.AllWebs)
                          {
  
                           try{
                            SPList sourceList = w.Lists["Ticks and  Cross"];
                            }catch(exception ex){ ..... }
  
                          }
                          s.Dispose();
                      }
  </code></pre>
  
  <p>All sites has same templates, so there is no chance that list is not ther. For some site i get the sourceList, for other its exception, its really wired</p>