We would like to remind you that as 
previously announced, destination URL fields in AdWords will become read-only on 
July 1, 2015. Starting on that date, we will also begin upgrading your URLs (if eligible) to the new 
Upgraded URLs structure.
Once this change goes live, you will get the following errors from the AdWords API:
In AdWords scripts, all methods that 
set the destination URL of various entities have been marked deprecated, and will generate a user error after 
July 1, 2015.
Before then, be sure to update your AdWords API and scripts code.  Use the Upgraded URL fields instead of the destination URL field when creating entities such as ads, keywords, or sitelinks. You can refer to our 
migration guide to learn how to upgrade your URLs, or our 
feature guide to learn more about Upgraded URLs. All our 
client libraries fully support upgraded URLs, and provide code examples that show you how to 
use this feature and 
upgrade your URLs.
If you have any further questions about this change, let us know via our 
API or 
scripts forum, or 
Google+ page.
 Anash P. Oommen, AdWords API Team
 Anash P. Oommen, AdWords API Team