Working errors requires identification of errors. Common errors are preventable and easily fixed. Errors during processing may be based due to malformed XML files creating an utter failure or may be caused during processing by the Seller Portal. These types of errors would occurred if loading the same data via the bulk Excel file templates as well.
Throughout this guide you see this note:
After a successful posting of the XML file, use the Processing Report API with the associated doc ID to verify if the file processed correctly or any errors occurred.
Consistently using the Processing Report API and working the errors, is a best practice.
Common errors are explained in our knowledge base here: https://marketplace.sears.com/seller-support/error-messages/
Additional error messages and their explanations may be found here: https://marketplace.sears.com/seller-support/category/products-and-inventory/item-creation/item-build-errors/
One common error is sending inventory, pricing or order prep time, etc. updates before an item has been successfully created. A message like “Cannot update ‘a pricing’ of the item with id ‘ABC’ because it doesn’t exist” will be received. You need to go back to the item creation process and correct any item errors in order to get the item created successfully before sending additional updates for that item.