With the recent change to the Search Network setting in the AdWords API we’ve noticed a few cases where network settings were used to pause campaigns by disabling all possible networks. To simplify campaign management and reduce ambiguity, we will disallow this campaign state going forward. Any operation disabling every network for a campaign will produce TargetError.TARGET_ERROR starting Nov 12th 2013.

The change will affect only versions v201309 and later. If you use network settings to pause your campaigns and have already migrated to v201309, please use the campaign status PAUSED instead.

If you do not update campaigns with every network target set to false, this change will not affect you.

As always, please feel free to ask any questions on the AdWords API forum or our Google+ page.