Strict Notice: Only variables should be passed by reference  in /var/www/vhosts/alphabez.de/httpdocs/lib/Zend/Db/Select.php on line 216

#0 /var/www/vhosts/alphabez.de/httpdocs/lib/Zend/Db/Select.php(216): mageCoreErrorHandler(2048, 'Only variables ...', '/var/www/vhosts...', 216, Array)
#1 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Eav/Model/Mysql4/Entity/Attribute/Collection.php(68): Zend_Db_Select->columns(Array)
#2 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Eav/Model/Config.php(605): Mage_Eav_Model_Mysql4_Entity_Attribute_Collection->useLoadDataFields()
#3 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php(367): Mage_Eav_Model_Config->loadCollectionAttributes('catalog_product', Array)
#4 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Catalog/Model/Resource/Eav/Mysql4/Product/Collection.php(303): Mage_Eav_Model_Entity_Collection_Abstract->addAttributeToSelect(Array, false)
#5 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Catalog/Model/Layer.php(119): Mage_Catalog_Model_Resource_Eav_Mysql4_Product_Collection->addAttributeToSelect(Array)
#6 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Catalog/Block/Navigation.php(87): Mage_Catalog_Model_Layer->prepareProductCollection(Object(Mage_Catalog_Model_Resource_Eav_Mysql4_Product_Collection))
#7 /var/www/vhosts/alphabez.de/httpdocs/app/design/frontend/alphabez/alphabez/template/catalog/navigation/left.phtml(29): Mage_Catalog_Block_Navigation->getCurrentChildCategories()
#8 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Template.php(144): include('/var/www/vhosts...')
#9 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Template.php(176): Mage_Core_Block_Template->fetchView('frontend/alphab...')
#10 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Template.php(193): Mage_Core_Block_Template->renderView()
#11 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Abstract.php(643): Mage_Core_Block_Template->_toHtml()
#12 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Text/List.php(43): Mage_Core_Block_Abstract->toHtml()
#13 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Abstract.php(643): Mage_Core_Block_Text_List->_toHtml()
#14 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Abstract.php(503): Mage_Core_Block_Abstract->toHtml()
#15 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Abstract.php(454): Mage_Core_Block_Abstract->_getChildHtml('left', true)
#16 /var/www/vhosts/alphabez.de/httpdocs/app/design/frontend/alphabez/alphabez/template/page/3columns.phtml(42): Mage_Core_Block_Abstract->getChildHtml('left')
#17 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Template.php(144): include('/var/www/vhosts...')
#18 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Template.php(176): Mage_Core_Block_Template->fetchView('frontend/alphab...')
#19 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Template.php(193): Mage_Core_Block_Template->renderView()
#20 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Block/Abstract.php(643): Mage_Core_Block_Template->_toHtml()
#21 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Model/Layout.php(526): Mage_Core_Block_Abstract->toHtml()
#22 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Action.php(339): Mage_Core_Model_Layout->getOutput()
#23 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Catalog/controllers/CategoryController.php(103): Mage_Core_Controller_Varien_Action->renderLayout()
#24 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Action.php(367): Mage_Catalog_CategoryController->viewAction()
#25 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(247): Mage_Core_Controller_Varien_Action->dispatch('view')
#26 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Front.php(158): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#27 /var/www/vhosts/alphabez.de/httpdocs/app/Mage.php(457): Mage_Core_Controller_Varien_Front->dispatch()
#28 /var/www/vhosts/alphabez.de/httpdocs/index.php(46): Mage::run()
#29 {main}