Notice: Only variables should be passed by reference  in /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/local/Cando/Collection/Model/Category/Url.php on line 19

#0 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/local/Cando/Collection/Model/Category/Url.php(19): mageCoreErrorHandler(8, 'Only variables ...', '/var/www/vhosts...', 19, Array)
#1 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Catalog/Model/Category/Url.php(83): Cando_Collection_Model_Category_Url->_getDirectUrl(Object(Mage_Catalog_Model_Category))
#2 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Catalog/Model/Category.php(433): Mage_Catalog_Model_Category_Url->getCategoryUrl(Object(Mage_Catalog_Model_Category))
#3 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Catalog/Block/Navigation.php(188): Mage_Catalog_Model_Category->getUrl()
#4 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/design/frontend/base/default/template/catalog/navigation/left.phtml(49): Mage_Catalog_Block_Navigation->getCategoryUrl(Object(Mage_Catalog_Model_Category))
#5 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/vhosts...')
#6 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/base/d...')
#7 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#8 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#9 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Text/List.php(43): Mage_Core_Block_Abstract->toHtml()
#10 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Text_List->_toHtml()
#11 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Abstract.php(641): Mage_Core_Block_Abstract->toHtml()
#12 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Abstract.php(585): Mage_Core_Block_Abstract->_getChildHtml('left', true)
#13 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/design/frontend/cando2015/default/template/page/2columns-left.phtml(23): Mage_Core_Block_Abstract->getChildHtml('left')
#14 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Template.php(241): include('/var/www/vhosts...')
#15 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/cando2...')
#16 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#17 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#18 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Model/Layout.php(558): Mage_Core_Block_Abstract->toHtml()
#19 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Controller/Varien/Action.php(390): Mage_Core_Model_Layout->getOutput()
#20 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Catalog/controllers/CategoryController.php(161): Mage_Core_Controller_Varien_Action->renderLayout()
#21 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/local/Amasty/Shopby/controllers/CategoryController.php(49): Mage_Catalog_CategoryController->viewAction()
#22 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Amasty_Shopby_CategoryController->viewAction()
#23 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('view')
#24 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#25 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/code/core/Mage/Core/Model/App.php(381): Mage_Core_Controller_Varien_Front->dispatch()
#26 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/app/Mage.php(686): Mage_Core_Model_App->run(Array)
#27 /var/www/vhosts/cando.eu/web/nl-nl/assortiment/index.php(148): Mage::run('be_nl', 'store')
#28 {main}