I am using trial version of the eBay plugin for version 3.8. When I try to send the product to eBay(production account) I get "Attachment request file is missing" message.
I noticed that I get this error on products that I just added with my own plugin. The ones that came with the nop database don't get this error.
Could the issue be in the fact that that the plugin was installed before I added these products, or I am missing some info for these products?