Fatal error: Call to a member function setActive() on a non-object in

Question

While clearing the cache error are came.

Fatal error: Call to a member function setActive() on a non-object in magento\app\code\core\Mage\Adminhtml\Controller\Action.php on line 104

logs created below

exception 'Mage_Core_Exception' with message 'Invalid block type:
Easylife_Pickup_Block_Page
Easylife_Pickup_Block_Page_Head
Easylife_Pickup_Block_Page_Notices
Easylife_Pickup_Block_Page_Header
Easylife_Pickup_Block_Page_Menu
Easylife_Pickup_Block_Notification_Baseurl
Easylife_Pickup_Block_Cache_Notifications
Easylife_Pickup_Block_Notification_Survey
Easylife_Pickup_Block_Notification_Security
Easylife_Pickup_Block_Widget_Breadcrumbs
Easylife_Pickup_Block_Page_Footer
Easylife_Pickup_Block_Notification_Toolbar
Easylife_Pickup_Block_Notification_Window
Easylife_Pickup_Block_Sales_Order_View
Easylife_Pickup_Block_Sales_Order_View_Tabs
Easylife_Pickup_Block_Sales_Order_View_Tab_Info
Easylife_Pickup_Block_Sales_Order_View_Messages
Easylife_Pickup_Block_Sales_Order_View_Info
Easylife_Pickup_Block_Sales_Order_View_Items
Easylife_Pickup_Block_Sales_Order_Payment
Easylife_Pickup_Block_Sales_Order_View_History
..........................
.............................
etc..

I don't know why it's came Can any one suggest me?

how can I resolve this?

Thanks.

Answer 1

This was an issue with cached functions from an extension that had been removed. Manually clearing the cache fixed the issue.

Manually clear the cache using one of the following methods:

• Use standard method Mage::app()->cleanCache() or Mage::app()->getCacheInstance()->flush();
• Use n98-magerun to clear the cache from the shell. (https://github.com/netz98/n98-magerun)
• Manually delete the var/cache directory (if file cache)
• Clear relevant db/redis/memcache cache

Additionally sometimes apc or opcode cache can cause issues, and restarting php may be required in those cases.