Fatal error: Unsupported operand types in Magento
Fatal error: Unsupported operand types in /public_html/app/code/core/Mage/ImportExport/Model/Export/Entity/Product.php on line 657
It has very simple solution. Please follow below step.
Just open /app/code/core/Mage/ImportExport/Model/Export/Entity/Product.php file
Find : $dataRow += $stockItemRows[$productId];
Replace with : $dataRow = array_merge($dataRow,$stockItemRows[$productId]);
Enjoy it.