Hello,

I can't quite figure out how to offer a download option for a product -- a report. I followed the instructions at http://www.ubercart.org/docs/user/3345/selling_files
No problem there.

But I need a separate SKU (I think) for the download, because in some cases customers will want to purchase the download *without* purchasing the physical product. So I need to use "adjustments", as explained here...
http://www.ubercart.org/docs/user/3364/product_skus_and_adjustments

In the atributes administration, I added an attribute called "Digital Download" to the product, and added the option "Yes". Now when I go to the Adjustments tab for the product, I just see the product's SKU repeated, and the name of the attribute with the word "Model" after it, like so: "Digital DownloadModel". There is also a Submit button. When I click the Submit button I get this error:

warning: Invalid argument supplied for foreach() in /home/watereus/public_html/sites/all/modules/ubercart/uc_attribute/uc_attribute.module on line 1032.

See attached screenshot.

Ultimately, what I want in the product listing is something that says "click here to purchase the download for $5". Something like that. Or a check box for "Purchase the download, $5." That way people who don't want to spend $40 for the hard copy can just download it for $5.

Thanks,
Ryan