( ! ) 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	95424	{main}( )	../index.php:0
2	0.0010	172488	Mage::run( )	../index.php:127
3	2.1518	2398344	Mage_Core_Controller_Varien_Front->dispatch( )	../Mage.php:459
4	2.1545	2527360	Mage_Core_Controller_Varien_Router_Standard->match( )	../Front.php:158
5	2.1553	2591856	Mage_Core_Controller_Varien_Action->dispatch( )	../Standard.php:248
6	2.2994	4348696	Mage_Catalog_Product_CompareController->addAction( )	../Action.php:376
7	2.3517	6206144	Mage_Catalog_Model_Product_Compare_List->addProduct( )	../CompareController.php:76
8	2.3519	6243048	Mage_Catalog_Model_Product_Compare_List->_addVisitorToItem( )	../List.php:39
9	2.3531	6396536	Mage_Core_Model_Abstract->getId( )	../List.php:76
10	2.3531	6396536	Mage_Core_Model_Abstract->getIdFieldName( )	../Abstract.php:173