Update Stock simple products

Hi @sebandrescc,

but the stock on simple products not appear correctyly, just “In Sotck” but no quantities

You have to import the stock for simple products in the main “Inventory” tab of our WooCommerce Add-On (the field from your second screenshot). You can use the “Set with XPath” option under “Manage stock” to turn manage stock off for parent variable products and on for variations & simple products.

If you don’t have anything in your import file to enable/disable manage stock on a per-record basis, you can use this code snippet to automatically turn it off for parent variable products: https://d.pr/n/sfkzIh.

IS possible to update stock only in simple products after the first bulk

Yes, you can use these instructions: http://www.wpallimport.com/documentation/woocommerce/syncing-stock/.