I have created new Grid in custom module. But when it use it displays following error.
Fatal error: Class 'XX_YY_Block_Adminhtml_Display' not found in C:\xampp\htdocs\xx\app\code\core\Mage\Core\Model\Layout.php on line 491
I found some articles and it mentions to update
layout.xml. But I could't found
layout.xml. How to solve this problem
enter preformatted text here