When catalog cache is manually purged, the links to the product images will change. Magento, the ecommerce engine for NCR Retail Online, serves up images in a smart way. It caches the product images in multiple directories. This allows the images and the pages load more quickly.

When image cache is purged, a new copy of the original image is created in all of those multiple directories, and those directories might not be the same ones where the "old” copy of where the images lived. This could pose a problem, if you're subscribed to outside services that build and submit product feeds to search engines for the purpose of Search Engine Marketing. If the image cache is manually purged, it will be necessary to provide a new feed to the services that utilize image links to your products.  You can manually generate your feeds, as often as you need.

If you already have the Feed Pro extension , please:

1. Do not try to generate the feed, when your NRO store is processing a publish file.
2. Always click the Flush Magento Cache and the Flush Cache Storage , right before generating the feed. This will prevent your feed from appending to itself, which would result in duplicate entries.

Of course, once you generate your feed, you'll want your feed submission sites to fetch the new feed. Or, you can download it to your computer and then manually upload it to your feed submission sites.