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#0 /mnt/sites/www.hats.com/files/html/app/code/local/Mage/Core/Controller/Response/Http.php(99): mageCoreErrorHandler(8, 'Undefined index...', '/mnt/sites/www....', 99, Array)
#1 /mnt/sites/www.hats.com/files/html/lib/Zend/Controller/Response/Abstract.php(766): Mage_Core_Controller_Response_Http->sendHeaders()
#2 /mnt/sites/www.hats.com/files/html/app/code/local/Mage/Core/Controller/Response/Http.php(126): Zend_Controller_Response_Abstract->sendResponse()
#3 /mnt/sites/www.hats.com/files/html/app/code/local/Amasty/Shopby/Helper/Data.php(249): Mage_Core_Controller_Response_Http->sendResponse()
#4 /mnt/sites/www.hats.com/files/html/app/code/local/Amasty/Shopby/Model/Observer.php(25): Amasty_Shopby_Helper_Data->error404()
#5 /mnt/sites/www.hats.com/files/html/app/code/core/Mage/Core/Model/App.php(1338): Amasty_Shopby_Model_Observer->handleCatalogControllerCategoryInitAfter(Object(Varien_Event_Observer))
#6 /mnt/sites/www.hats.com/files/html/app/code/core/Mage/Core/Model/App.php(1317): Mage_Core_Model_App->_callObserverMethod(Object(Amasty_Shopby_Model_Observer), 'handleCatalogCo...', Object(Varien_Event_Observer))
#7 /mnt/sites/www.hats.com/files/html/app/Mage.php(447): Mage_Core_Model_App->dispatchEvent('catalog_control...', Array)
#8 /mnt/sites/www.hats.com/files/html/app/code/core/Mage/Catalog/controllers/CategoryController.php(65): Mage::dispatchEvent('catalog_control...', Array)
#9 /mnt/sites/www.hats.com/files/html/app/code/core/Mage/Catalog/controllers/CategoryController.php(114): Mage_Catalog_CategoryController->_initCatagory()
#10 /mnt/sites/www.hats.com/files/html/app/code/core/Mage/Core/Controller/Varien/Action.php(419): Mage_Catalog_CategoryController->viewAction()
#11 /mnt/sites/www.hats.com/files/html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('view')
#12 /mnt/sites/www.hats.com/files/html/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#13 /mnt/sites/www.hats.com/files/html/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#14 /mnt/sites/www.hats.com/files/html/app/Mage.php(683): Mage_Core_Model_App->run(Array)
#15 /mnt/sites/www.hats.com/files/html/index.php(97): Mage::run('kangol', 'website')
#16 {main}