Google Data Feed Image not working

[Nstarleather]

I've followed the instructions here:https://docs.miva.com/developer/addi...d/#description
And the Image Link filed is completely blank in the feed. What am I missing? I checked and my images do have the "main" field used on the products.

[Nick]

Nstarleather check to make sure the Image Type: Main custom field is assigned to the template:

main_image.JPG