Next steps: We are working on a resolution and will provide an update in an upcoming release. If your app is unable to use DSN, the app will need to be modified to allow for DSN or to use a newer ODBC driver than Microsoft ODBC SQL Server Driver (sqlsrv32.dll).Note: We recommend the latest version of Microsoft ODBC Driver 17 for SQL Server, as it is more compatible with apps currently using the legacy Microsoft ODBC SQL Server Driver (sqlsrv32.dll) than Microsoft ODBC Driver 18 for SQL Server. If your app is already using or able to use Data Source Name (DSN) to select ODBC connections, install Microsoft ODBC Driver 17 for SQL Server and select it for use with your app using DSN.Workaround: To mitigate this issue, you can do one of the following:

If you are unsure if you are using any affected apps, open any apps which use a database and then open Command Prompt (select Start then type command prompt and select it) and type the following command: tasklist /m sqlsrv32.dll This issue might occur when calling SQLBindCol function before SQLFetch or calling SQLGetData function after SQLFetch and when a value of 0 (zero) is given for the ‘BufferLength’ argument for fixed datatypes larger than 4 bytes (such as SQL_C_FLOAT). Note for developers: Apps affected by this issue might fail to fetch data, for example when using the SQLFetch function. You might receive an error within the app or you might receive an error from SQL Server, such as 'The EMS System encountered a problem' with 'Message: Protocol error in TDS Stream' or 'Message: Unknown token received from SQL Server'. Database connections using Microsoft ODBC SQL Server driver might fail.Īfter installing KB5019959, apps which use ODBC connections utilizing the Microsoft ODBC SQL Server Driver (sqlsrv32.dll) to access databases might fail to connect.

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