Fatal error: Uncaught Error: Call to undefined method Mage_Catalog_Model_Resource_Category_Flat_Collection::getAllIdsSql() in /var/www/magento/app/code/core/Mage/Catalog/Model/Resource/Category/Tree.php:295 Stack trace: #0 /var/www/magento/app/code/core/Mage/Catalog/Model/Resource/Category/Tree.php(242): Mage_Catalog_Model_Resource_Category_Tree->_getInactiveItemIds() #1 /var/www/magento/app/code/core/Mage/Catalog/Model/Resource/Category/Tree.php(154): Mage_Catalog_Model_Resource_Category_Tree->_getDisabledIds() #2 /var/www/magento/app/code/core/Mage/Catalog/Model/Resource/Category.php(576): Mage_Catalog_Model_Resource_Category_Tree->addCollectionData() #3 /var/www/magento/app/code/core/Mage/Catalog/Model/Category.php(818): Mage_Catalog_Model_Resource_Category->getCategories() #4 /var/www/magento/app/code/core/Mage/Catalog/Helper/Category.php(82): Mage_Catalog_Model_Category->getCategories() #5 /var/www/magento/app/code/core/Mage/Catalog/Model/Observer.php(217): Mage_Catalog_Helper_Category->getStoreCategories() #6 /var/w in /var/www/magento/app/code/core/Mage/Catalog/Model/Resource/Category/Tree.php on line 295