Symptoms
Assume that you connect to an instance of SQL Server 2014 or 2016 by using Microsoft ODBC Driver 11 for SQL Server. When you execute a query that retrieves data of the sql_variant data type, you may receive an error message that resembles the following:
An error encountered: SQLState = HY000, NativeError: 0, ErrorMessage: [Microsoft][ODBC Driver 11 for SQL Server]Protocol error in TDS stream
Resolution
This problem was fixed in the following cumulative updates for SQL Server:
About cumulative updates for SQL Server
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
Latest cumulative update for SQL Server 2014 (SP1/SP2) Latest cumulative update for SQL Server 2016
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology Microsoft uses to describe software updates.
