Verification of product model files

Guidewire provides configuration verification of the product model files during a rolling upgrade to ensure that the rolling upgrade contains only valid (permitted) changes to the product model. Thus, be aware that Product Designer inserts empty XML tags for certain elements (<AvailabilityScript/>, for example) if you use Product Designer to modify a product model pattern created outside of Product Designer. (This can be a product model created in a PolicyCenter release prior to PolicyCenter 8.0, for example.) While these changes are generally legal to make in PolicyCenter, the upgrade configuration verifier flags the changes as illegal and thus blocks the rolling upgrade.