fatal error after typo3 upgrade

Question

After I upgraded a typo3 4.5 LTS to Typo3 6.2 LTS I get a fatal error saying:

Fatal error: Class '\' not found in /home/www/dev2.mysite.com/typo3_src-6.2.13/typo3/sysext/core/Classes/Cache/CacheFactory.php on line 75

Do you have any idea how I can fix it ?

Answer 1

clean your cache -- hard way: goto the install tool -> important actions -> clean cache

remove everything in typo3temp/ (use rm -rf typo3temp/* )

Then try again.