Assume that you use Microsoft SQL Server 2016 and 2017 Analysis Services (Multidimensional model). When you create a subcube, you may receive an error message that resembles the following:

Internal error: An unexpected error occurred (file FileName, line LineNumber, function FunctionName).

Additionally, a dump file is generated by SQL Server.


This fix is included in the following cumulative updates for SQL Server: 4077064

Cumulative Update 7 for SQL Server 2017

Cumulative Update 8 for SQL Server 2016 Service Pack 1

About SQL Server builds

Each new build for SQL Server 2016 contains all the hotfixes and security fixes that were in the previous build. We recommend that you install the latest cumulative updates for SQL Server:

Latest cumulative update for SQL Server 2017

Latest build for SQL Server 2016


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


Learn about the terminology Microsoft uses to describe software updates.

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