SingleFeed has integrated with the Yahoo! Store platform to allow you to easily pull your products into SingleFeed from your store.  Here you can view the Yahoo! Store Import Instructions.  Because all Yahoo! Stores use different versions and settings, sometimes our automated import process fails to recognize certain fields.  In these cases you may get an error stating that you are missing certain required fields (like Manufacturer or Category) even though you have them.  If you experience this issue, please file a ticket with our merchant support team as we have solutions in place which we can recommend.