After I implemented the patch SUPEE 10415, checkout cart url /checkout/cart/ got an error, and when I reverted the Patch it now works as expected but I need to implement the patch asap.


  • Hi Please share the error you are facing.
    – Meetanshi
    Dec 4, 2017 at 3:39
  • Here is the screenshot of the error in checkout/cart url prntscr.com/hirbry Dec 4, 2017 at 5:31
  • Here is the exact error. lib/Unserialize/Reader/Arr.php(102): Unserialize_Reader_ArrValue->read('N', ';') Dec 4, 2017 at 5:38
  • @JmCabugnason Did you apply the 10415 patch?
    – Gem
    May 19, 2018 at 5:30

2 Answers 2


After patching SUPEE-10415, causes an error “Unsupported data type N” Solution: The cause of this issue is not having SUPEE-8788 V2 installed. To fix this, download Magento and copy


files to your website. check if any changes between files.

Please take Security Patch SUPEE-10415 - Possible Issues? as reference.


Please follow below steps.

(1) First revert the patch if applied.

(2) Check your current magento version and download same fresh version.

(3) Just put lib/Unserialize/Reader/Arr.php file from downloded version

(4) Now apply patch again .

Error will be resolved. Dont forget to clear cache.

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