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Do not use MPN in the ExternalProductID container of AddItem, use the BrandMPN container in ProductListingDetails instead.

Asked by: 633 views Programming

When enter a MPN in the ExternalProductID field, I recieve the error,

          <ShortMessage>Input data is invalid.</ShortMessage>
          <LongMessage>Input data for tag &lt;ExternalProductIdentifierType&gt;
               is invalid or missing. Please check API documentation.</LongMessage>
          <ErrorParameters ParamID=”0″>


Why am I getting this?