title: Class 'Zend_Log' not found - SSH -reindexall for Magento
body: <p>Just recently have become unable to reindex the Catalog URL Rewrites in Magento back office with Magento producing the ever so helpful error of 'There was a problem with reindexing process.' so I attempted to reindex via SSH using php ./shell/indexer.php -reindexall
   and received the following...</p>
  
  <p>Warning: include(Zend/Log.php): failed to open stream: No such file or directory in /home/reprebat/public_html/lib/Varien/Autoload.php on line 93</p>
  
  <p>Warning: include(): Failed opening 'Zend/Log.php' for inclusion (include_path='"."      ') in /home/reprebat/public_html/lib/Varien/Autoload.php on line 93</p>
  
  <p>Fatal error: Class 'Zend_Log' not found in /home/reprebat/public_html/app/code/core/Mage/Core/functions.php on line 247</p>
  
  <p>There appears to be nothing out of the ordinary at any of these files/lines - just the default Magento file versions.</p>
  
  <p>I have no idea when this problem occurred or this error was triggered - and unlike most other similar issues I found online, it often appears to be related to a 3rd party extension with incorrect method names... But our error doesn't even specify anything such as this - or anything of particular use to me.</p>
  
  <p>I don't suppose anyone could advise of what this could potentially be indicating please? Any assistance greatly appreciated. Thanks in advance.</p>