jos-Error: Category not found

JSite -> dispatch() @ C:\xampp\htdocs\joomla17\index.php:42
JComponentHelper :: renderComponent() @ C:\xampp\htdocs\joomla17\includes\application.php:194
JComponentHelper :: executeComponent() @ C:\xampp\htdocs\joomla17\libraries\joomla\application\component\helper.php:348
require_once() @ C:\xampp\htdocs\joomla17\libraries\joomla\application\component\helper.php:380
JController -> execute() @ C:\xampp\htdocs\joomla17\components\com_content\content.php:16
ContentController -> display() @ C:\xampp\htdocs\joomla17\libraries\joomla\application\component\controller.php:761
JController -> display() @ C:\xampp\htdocs\joomla17\components\com_content\controller.php:74
ContentViewCategory -> display() @ C:\xampp\htdocs\joomla17\libraries\joomla\application\component\controller.php:722
JError :: raiseError() @ C:\xampp\htdocs\joomla17\components\com_content\views\category\view.html.php:59
JError :: raise() @ C:\xampp\htdocs\joomla17\libraries\joomla\error\error.php:251