I am trying to upgrade a local magento site from v1.9.2.2 to v1.9.3.1.

However, after copying the files from the v1.9.3.1 to my root folder I get this error when trying to access the site :

Fatal error: Class 'Mage_Adminhtml_Helper_Help_Mapping' not found in app/code/core/Mage/Adminhtml/Helper/Data.php on line 35

Any idea where it comes from and what I can do to fix it ?

  • Which way you are using to upgrade, by using magento connect manager its not possible. Some more days to taken by using magento connect manager. – Gem Jan 11 '17 at 10:02
  • Thanks for your reply ! I am doing it manually by unpacking the Magento files into my root folder – Arnold Jan 11 '17 at 10:05
  • Well I fixed it, just had to recompile. Thanks everyone – Arnold Jan 11 '17 at 10:32
  • @ arnold : Is it know about discount for grouped products – Gem Jan 11 '17 at 10:46

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