On Thursday, 
November 30th, 2017, in accordance with the 
deprecation schedule, v201611 of the DFP API will be sunset. At that time, any requests made to this version will return errors.
If you’re still using this version, now’s the time to upgrade to the 
latest release and take advantage of new features like support for creating 
ImageOverlayCreatives, new Ad Exchange reporting 
dimensions and columns, and the 
change history table. In order to upgrade, check the 
release notes to identify any breaking changes, grab the latest version of your client library, and update your code.
Significant changes include:
This is not an exhaustive list, so as always, don't hesitate to 
reach out to us with any questions. To be notified of future deprecations and sunsets, join the 
DFP API Sunset Announcements group and adjust your notification settings.