( ! ) 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	95360	{main}( )	../index.php:0
2	0.0027	172408	Mage::run( )	../index.php:127
3	0.9039	2248512	Mage_Core_Controller_Varien_Front->dispatch( )	../Mage.php:459
4	0.9063	2377544	Mage_Core_Controller_Varien_Router_Standard->match( )	../Front.php:158
5	0.9072	2442008	Mage_Core_Controller_Varien_Action->dispatch( )	../Standard.php:248
6	2.3436	4205512	Mage_Catalog_Product_CompareController->addAction( )	../Action.php:376
7	2.5313	6061784	Mage_Catalog_Model_Product_Compare_List->addProduct( )	../CompareController.php:76
8	2.5315	6098688	Mage_Catalog_Model_Product_Compare_List->_addVisitorToItem( )	../List.php:39
9	2.5326	6252168	Mage_Core_Model_Abstract->getId( )	../List.php:76
10	2.5326	6252168	Mage_Core_Model_Abstract->getIdFieldName( )	../Abstract.php:173