Unable to find writable var_dir

#0 /home/vanams01/domains/vanamsteldiamant.nl/public_html/app/code/core/Mage/Core/Model/Config/Options.php(122): Mage_Core_Model_Config_Options->getVarDir()
#1 /home/vanams01/domains/vanamsteldiamant.nl/public_html/app/code/core/Mage/Core/Model/Config/Options.php(39): Mage_Core_Model_Config_Options->getCacheDir()
#2 /home/vanams01/domains/vanamsteldiamant.nl/public_html/app/Mage.php(205): Mage_Core_Model_Config_Options->getDir('cache')
#3 /home/vanams01/domains/vanamsteldiamant.nl/public_html/app/code/core/Mage/Core/Model/App.php(944): Mage::getBaseDir('cache')
#4 /home/vanams01/domains/vanamsteldiamant.nl/public_html/app/code/core/Mage/Core/Model/App.php(977): Mage_Core_Model_App->getCache()
#5 /home/vanams01/domains/vanamsteldiamant.nl/public_html/app/code/core/Mage/Core/Model/Config.php(330): Mage_Core_Model_App->loadCache('config_global')
#6 /home/vanams01/domains/vanamsteldiamant.nl/public_html/lib/Varien/Simplexml/Config.php(382): Mage_Core_Model_Config->_loadCache('config_global')
#7 /home/vanams01/domains/vanamsteldiamant.nl/public_html/app/code/core/Mage/Core/Model/Config.php(147): Varien_Simplexml_Config->loadCache()
#8 /home/vanams01/domains/vanamsteldiamant.nl/public_html/app/code/core/Mage/Core/Model/App.php(242): Mage_Core_Model_Config->init(Array)
#9 /home/vanams01/domains/vanamsteldiamant.nl/public_html/app/Mage.php(432): Mage_Core_Model_App->init('vanamsteldiamon...', 'store', Array)
#10 /home/vanams01/domains/vanamsteldiamant.nl/public_html/app/Mage.php(453): Mage::app('vanamsteldiamon...', 'store', Array)
#11 /home/vanams01/domains/vanamsteldiamant.nl/public_html/index.php(90): Mage::run('vanamsteldiamon...')
#12 {main}