FIX: "AdomdConnectionException" error when SSRS 2016 and 2017 data source uses msmdpump.dll

Applies to: SQL Server 2016 Service Pack 1SQL Server 2016 DeveloperSQL Server 2016 Enterprise


Assume that you are using Microsoft SQL Server 2016 or 2017 Reporting Services (SSRS). When the SSRS data source uses msmdpump.dll to establish a connection, you may receive an exception that resembles the following:

AdomdConnectionException: The connection is not open”


This issue is fixed in the following cumulative updates for SQL Server:

       Cumulative Update 4 for SQL Server 2017

       Cumulative Update 6 for SQL Server 2016 SP1


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


Learn about the terminology that Microsoft uses to describe software updates.