FIX: Error when you use Database Engine Tuning Advisor in SQL Server 2014

Applies to: SQL Server 2014 DeveloperSQL Server 2014 DeveloperSQL Server 2014 Enterprise

Symptoms


When you use Database Engine Tuning Advisor to tune a database that uses a supplementary character collation in an instance of Microsoft SQL Server 2014, you receive the following error message:

Cannot successfully retrieve recommendations information.
ADDITIONAL INFORMATION:
Invalid session id (DTAClient)

Resolution


Cumulative update information

The issue was first fixed in the following cumulative update of SQL Server 2014:


Status


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.