Uncaught Error: Call to a member function setLayer() in category view page?

[ramsampathi]

Fatal error: Uncaught Error: Call to a member function setLayer() on boolean in /var/www/html/app/code/core/Mage/Catalog/Block/Layer/View.php:143 Stack trace: #0 /var/www/html/app/code/core/Mage/Core/Block/Abstract.php(297): Mage_Catalog_Block_Layer_View->_prepareLayout() #1 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(456): Mage_Core_Block_Abstract->setLayout(Object(Aoe_LayoutConditions_Model_Layout)) #2 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(472): Mage_Core_Model_Layout->createBlock('catalog/layer_v...', 'catalog.leftnav') #3 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(239): Mage_Core_Model_Layout->addBlock('catalog/layer_v...', 'catalog.leftnav') #4 /var/www/html/app/code/local/Aoe/LayoutConditions/Model/Layout.php(76): Mage_Core_Model_Layout->_generateBlock(Object(Mage_Core_Model_Layout_Element), Object(Mage_Core_Model_Layout_Element)) #5 /var/www/html/app/code/core/Mage/Core/Model/Layout.php(205): Aoe_LayoutConditions_Model_Layout->_generateBlock(Object(Mage_Core_Model_Layout_Elem in /var/www/html/app/code/core/Mage/Catalog/Block/Layer/View.php on line 143