Full Error Message:

Barcodes or UPC codes are required for these products

To resolve, you must add barcodes to these products or apply for ‘UPC Exemption’ from the marketplace.

SKU, Missing Attributes standard_product_id. SKU doesn’t match any ASINs. Make sure that all standard product ids (such as UPC, ISBN, EAN, or JAN codes) are correct. To create a new ASIN, include the following attributes: standard_product_id. Feed ID: 0. For more troubleshooting help, see http://sellercentral.amazon.com/gp/errorcode/200692370

Problem:

Amazon requires a valid barcode for the product to be listed.

Solution:

Make sure the product has a valid GS1 standard barcode assigned to the product.

If the barcode is present then check the barcode field mapping is in place.