( ! ) Fatal error: Call to a member function getIdFieldName() on a non-object in /var/www/vhosts/h53122.host230.alfahosting-server.de/html/magento/app/code/core/Mage/Core/Model/Abstract.php on line 144
Call Stack
#	Time	Memory	Function	Location
1	0.0001	95136	{main}( )	../index.php:0
2	0.0010	172200	Mage::run( )	../index.php:127
3	0.0191	1792240	Mage_Core_Controller_Varien_Front->dispatch( )	../Mage.php:459
4	0.0212	1921320	Mage_Core_Controller_Varien_Router_Standard->match( )	../Front.php:158
5	0.0218	1985672	Mage_Core_Controller_Varien_Action->dispatch( )	../Standard.php:248
6	4.5900	3753776	Mage_Catalog_Product_CompareController->addAction( )	../Action.php:376
7	4.6227	5613856	Mage_Catalog_Model_Product_Compare_List->addProduct( )	../CompareController.php:76
8	4.6228	5650760	Mage_Catalog_Model_Product_Compare_List->_addVisitorToItem( )	../List.php:39
9	4.6236	5804240	Mage_Core_Model_Abstract->getId( )	../List.php:76
10	4.6236	5804240	Mage_Core_Model_Abstract->getIdFieldName( )	../Abstract.php:173