.. include:: /Includes.rst.txt ========================== TYPO3 Exception 1245673367 ========================== .. include:: /If-you-encounter-this-exception.rst.txt The given class "Tx_Extname_Classname" is not a registered object. ================================================================== I get this error after installing an Extension which tries to use a Class not defined in any of the typical Extbase Autoloader locations. :: Oops, an error occurred! The given class "Tx_Extname_Classname" is not a registered object. Occurs in: :file:`typo3/sysext/extbase/Classes/SignalSlot/Dispatcher.php` :: throw new Tx_Extbase_SignalSlot_Exception_InvalidSlotException(sprintf('Cannot dispatch %s::%s to class %s. The object manager is not yet available in the Signal Slot Dispatcher and therefore it cannot dispatch classes.', $signalClassName, $signalName, $slotInformation['class']), 1298113624); } if (!$this->objectManager->isRegistered($slotInformation['class'])) { throw new Tx_Extbase_SignalSlot_Exception_InvalidSlotException('The given class "' . $slotInformation['class'] . '" is not a registered object.', 1245673367); } $object = $this->objectManager->get($slotInformation['class']); } - caused by mismatch between the classname in the signal slot (in :file:`ext_tables.php`) and the namespace/classname combination (fully qualified class name) in :file:`Classes/Controller/XxxController.php`