How can I solve this :

Unsupported operand types in C:\wamp\www\abc\app\code\core\Mage\ImportExport\Model\Export\Entity\Product.php on line 875

It occurs when trying to export products via the admin panel system -> import/export menu.

  • What version of php are you running? Apr 28, 2016 at 8:25
  • my current php version 5.5.12
    – Gem
    Apr 28, 2016 at 8:41
  • scrap my answer then...:) What version of Magento is it? Apr 28, 2016 at 8:44
  • magento
    – Gem
    Apr 28, 2016 at 8:47
  • that line does stand out as being different to all the others in that function so have posted an answer I think will work as a fix. Apr 28, 2016 at 8:58

5 Answers 5


Magento have a patch for this issue as SUPEE-6511.

Ask magento support for the official patch file, however the change provided is simple enough. Around line 875-ish in app/code/core/Mage/ImportExport/Model/Export/Entity/Product.php you should update as follows.

-    $dataRow += $stockItemRows[$productId];
+    if (isset($stockItemRows[$productId])) {
+        $dataRow = array_merge($dataRow, $stockItemRows[$productId]);
+    }
  • Where can we find the official patch file for SUPEE-6511? We are having the same issue on CE which doesn't offer Magento support. However, I would prefer to have the official patch on file if there is one. Sep 15, 2016 at 16:47
  • No official patch on hand sorry. Magento only generally hand out security patches. The only other source of patches would be github.com/brentwpeterson/magento-patches Sep 15, 2016 at 22:41
  • Fix mentioned here is correct, but issue still exists in github.com/firegento/magento/blob/… Feb 7, 2018 at 14:58
  • Thanks, I confirm that it worked from my end using Magento Sep 23, 2019 at 5:32

Looking at the rest of the $dataRow manipulations that line does look odd.

Try replacing

875:    $dataRow += $stockItemRows[$productId];


$dataRow = array_merge($dataRow,$stockItemRows[$productId]);

However, directly modifying core files is bad so you should override it but a quick test should show if it is working.


Assuming that the problem line (as you didn't specify your Magento version) looks something like this:

875:    $dataRow += $stockItemRows[$productId];

My first thing to check would be the version of php you are using. I do not think that, for pre PHP v5.2 (and some of v5.2...), the += operand is not supported for arrays, which this action is.


This worked great: $dataRow = array_merge($dataRow,$stockItemRows[$productId]);


This is perfectly work for me. Thanks.

$dataRow = array_merge($dataRow,$stockItemRows[$productId]);

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