( ! ) 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	0.0143	172408	Mage::run( )	../index.php:127
3	0.5353	2253232	Mage_Core_Controller_Varien_Front->dispatch( )	../Mage.php:459
4	0.5376	2382544	Mage_Core_Controller_Varien_Router_Standard->match( )	../Front.php:158
5	0.5398	2447568	Mage_Core_Controller_Varien_Action->dispatch( )	../Standard.php:248
6	0.6350	4211032	Mage_Catalog_Product_CompareController->addAction( )	../Action.php:376
7	0.6649	6067808	Mage_Catalog_Model_Product_Compare_List->addProduct( )	../CompareController.php:76
8	0.6679	6105256	Mage_Catalog_Model_Product_Compare_List->_addVisitorToItem( )	../List.php:39
9	0.6688	6258752	Mage_Core_Model_Abstract->getId( )	../List.php:76
10	0.6688	6258752	Mage_Core_Model_Abstract->getIdFieldName( )	../Abstract.php:173