Front controller reached 100 router match iterations

#0 /data/www/html/api/require/app/code/core/Mage/Core/Controller/Varien/Front.php(208): Mage::throwException('Front controlle...')
#1 /data/www/html/api/require/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#2 /data/www/html/api/require/app/Mage.php(683): Mage_Core_Model_App->run(Array)
#3 /data/www/html/api/htdocs/index.php(52): Mage::run('', 'store', Array)
#4 {main}