.. include:: /Includes.rst.txt .. _remove-temporary-cache-files: Remove temporary cache files ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ In typo3temp/Cache/Code/cache_core you will most likely find files named :file:`ext_localconf_*.php` or :file:`ext_tables_*.php`. These files must be removed as well. Go to "Important actions" and click "Clear all cache": .. figure:: ../../Images/Important-Actions-Clear-All-Cache.png :alt: The option "Clear all Cache" in the Install Tool. This method will remove all files from the folder :file:`typo3temp/Cache/Code/cache_core/`. Additionally, after an upgrade to a new major version, you should also delete the other temporary files, which TYPO3 saves in :file:`typo3temp/`. In the Install Tool go to "Clean up" to do so.