Notice: Undefined index: HTTP_X_REQUESTED_WITH  in /var/www/html/magento/releases/magento201409190516/app/code/local/Magestore/Affiliateplus/Helper/Data.php on line 65

#0 /var/www/html/magento/releases/magento201409190516/app/code/local/Magestore/Affiliateplus/Helper/Data.php(65): mageCoreErrorHandler(8, 'Undefined index...', '/var/www/html/m...', 65, Array)
#1 /var/www/html/magento/releases/magento201409190516/app/code/local/Magestore/Affiliateplus/Model/Observer.php(752): Magestore_Affiliateplus_Helper_Data->isRobots()
#2 /var/www/html/magento/releases/magento201409190516/app/code/local/Magestore/Affiliateplus/Model/Observer.php(82): Magestore_Affiliateplus_Model_Observer->saveClickAction(Object(Varien_Event_Observer))
#3 /var/www/html/magento/releases/magento201409190516/app/code/core/Mage/Core/Model/App.php(1303): Magestore_Affiliateplus_Model_Observer->controllerActionPredispatch(Object(Varien_Event_Observer))
#4 /var/www/html/magento/releases/magento201409190516/app/code/core/Mage/Core/Model/App.php(1284): Mage_Core_Model_App->_callObserverMethod(Object(Magestore_Affiliateplus_Model_Observer), 'controllerActio...', Object(Varien_Event_Observer))
#5 /var/www/html/magento/releases/magento201409190516/app/Mage.php(416): Mage_Core_Model_App->dispatchEvent('controller_acti...', Array)
#6 /var/www/html/magento/releases/magento201409190516/app/code/core/Mage/Core/Controller/Varien/Action.php(505): Mage::dispatchEvent('controller_acti...', Array)
#7 /var/www/html/magento/releases/magento201409190516/app/code/core/Mage/Core/Controller/Front/Action.php(59): Mage_Core_Controller_Varien_Action->preDispatch()
#8 /var/www/html/magento/releases/magento201409190516/app/code/core/Mage/Core/Controller/Varien/Action.php(409): Mage_Core_Controller_Front_Action->preDispatch()
#9 /var/www/html/magento/releases/magento201409190516/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('view')
#10 /var/www/html/magento/releases/magento201409190516/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#11 /var/www/html/magento/releases/magento201409190516/app/code/core/Mage/Core/Model/App.php(349): Mage_Core_Controller_Varien_Front->dispatch()
#12 /var/www/html/magento/releases/magento201409190516/app/Mage.php(640): Mage_Core_Model_App->run(Array)
#13 /var/www/html/magento/releases/magento201409190516/index.php(97): Mage::run('car_org', 'website')
#14 {main}