SKU ########, Missing Attributes standard_product_id,missing_keyset_reason. SKU ###### does not match any ASIN. Creation of a new ASIN requires the following missing attributes: standard_product_id,missing_keyset_reason. Feed ID: 0. For details, see Amazon Sign In
This message at first appears to mean that Amazon can’t find the product in their catalogue but will create it if certain attributes are supplied. However its real meaning is that the EAN provided is incorrect. Similar to credit cards, the last number an EAN is a check number that acts as a safety mechanism. A calculation is done on the other 12 numbers. This defines what the last number should be. This message is Amazon’s way of telling you that your EAN is incorrect.
XML Parsing Error at Line 1041, Column 2276: cvc-maxLength-valid: Value '…
This message is letting you know that you have entered too many characters into a field.
The solution is to modify your mapping that feed to that field limiting the amount of characters accepted to the maximum length of the field in question. You can find the maximum length of a field in the data mappings page where it is displayed as a restriction.
The mapping should include something like this:
SUBSTRING ( FIELDNAME, 0 , length_of_field_eg_2000 )