FIX: An access violation occurs when you run a MDX query that involves a calculated member that uses the SUM({set of measures}) function where the set contains measures from different measure groups in SQL Server 2008

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Microsoft distributes Microsoft SQL Server 2008 fixes as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 fix release.
Symptoms
Consider the following scenario:
  • In Microsoft SQL Server 2008 Analysis Services, you have a calculated member that uses the SUM({set of measures}) function. Additionally, the set contains measures from different measure groups.
  • You run a Multidimensional Expressions (MDX) query and the query uses the calculated member.
In this scenario, an access violation may occur and you receive the following error message:
Internal error: An unexpected exception occurred.


Additionally, a minidump file is generated in the SQL Server log folder.

Note This issue does not occur in Microsoft SQL Server 2005 Analysis Services.
Resolution
The fix for this issue was first released in Cumulative Update 4 for SQL Server 2008 Service Pack 1. For more information about this cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
973602 Cumulative update package 4 for SQL Server 2008 Service Pack 1
Note Because the builds are cumulative, each new fix release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 fix release. Microsoft recommends that you consider applying the most recent fix release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
970365 The SQL Server 2008 builds that were released after SQL Server 2008 Service Pack 1 was released
Microsoft SQL Server 2008 hotfixes are created for specific SQL Server service packs. You must apply a SQL Server 2008 Service Pack 1 hotfix to an installation of SQL Server 2008 Service Pack 1. By default, any hotfix that is provided in a SQL Server service pack is included in the next SQL Server service pack.
Workaround
To work around this problem, replace the SUM({set of measures}) function with the plus sign ( + ) operator.

For example, you can replace the following SUM({set of measures}) function:

SUM(M1, M2, M3, M4)

with:

M1 + M2 + M3 + M4

Note This method may impact performance.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
For more information about the Incremental Servicing Model for SQL Server, click the following article number to view the article in the Microsoft Knowledge Base:
935897 An Incremental Servicing Model is available from the SQL Server team to deliver hotfixes for reported problems


For more information about the naming schema for SQL Server updates, click the following article number to view the article in the Microsoft Knowledge Base:
822499 New naming schema for Microsoft SQL Server software update packages


For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
Properties

Article ID: 975272 - Last Review: 01/16/2015 01:30:00 - Revision: 2.0

Microsoft SQL Server 2008 Analysis Services

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