TYPO3 Core

TYPO3 6.0.0rc1

PHP_VERSION : 5.3.3-7+squeeze14

I guess, this is because the index.php file in the document root is not a link to typo3_src/index.php and therefore contains "old" code ... that is the only plausible reason for this error.

@Franz Koch: Please take care, that your main index.php in the document root is up to date. OTOH: If you run on windows, it might also be true that the 'not linked' packages for windows systems still deliver an old index.php by default.

@Franz Koch: Your document root index.php file should contain the code below. If this is not the case, and if you did a fresh full package install, could you please specify which package you downloaded?

require 'typo3/sysext/core/Classes/Core/Bootstrap.php';
\TYPO3\CMS\Core\Core\Bootstrap::getInstance()->baseSetup('');
require(PATH_tslib . 'index_ts.php');

Yes, indeed I had to remove the file index.php and create a symbolic link. This has survived many TYPO3 updates without any problems.

$ mv index.php index.php.bak
$ ln -s typo3_src/index.php

This case is fixed now.