Yesterday we identified an issue with our ReportService that is causing some reports to return incomplete or no data. We are working quickly to resolve this issue.
As this is a non-systematic (and therefore unpredictable) issue, we recommend that you double-check your reports in order to ensure that they are complete. You can diagnose incomplete/truncated reports by checking if the report’s XML is valid.
This bug is specific to the AdWords API and does not affect the AdWords web interface (http://adwords.google.com). Therefore, you can still pull complete reports via the web interface.
We apologize again for the inconvenience, and will notify you as soon as we have more information.
-- Rohit Dhawan, Product Manager
