Full Error Message:

Brand and MPN is missing

The brand name and MPN (Manufacturer Part Number) is missing, please specify a mapping for these fields and reupload this product.

Error: Input data is invalid.; Input data for tag BrandMPN is invalid or missing. Please check API documentation.

Problem:

Ebay requires a brand and a manufacturer part number which is missing for the product in question.

Solution:

Check there is a brand value for the product and it’s mapped to ChannelUnity’s ‘Brand Name’ field in field mappings.

Do the same for manufacturer part number and map ChannelUnity’s ‘Mfr Part Number’ field in field mappings.  If the product does not have a manufacturer part number then map ChannelUnity’s ‘Mfr Part Number’ field to the ‘Sku’ field.