Assume that you have an UPDATE CUBE statement that uses the USE_WEIGHTED_ALLOCATION or USE_WEIGHTED_INCREMENT allocation methodin Microsoft SQL Server 2012 Analysis Services (SSAS 2012). When you run the UPDATE CUBE statement, a value of "0" may be returned instead of the expected "null" value.
Note This issue does not occur in SSAS 2008 R2 or earlier in versions of SSAS.
Cumulative update information
Cumulative Update 4 for SQL Server 2012 Service Pack 1
The fix for this issue was first released in Cumulative Update 4. For more information about how to obtain this cumulative update package for SQL Server 2012 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:
2833645 Cumulative update package 4 for SQL Server 2012 Service Pack 1Note 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 2012 Service Pack 1 fix release. We recommend 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:
2772858 The SQL Server 2012 builds that were released after SQL Server 2012 Service Pack 1 was released
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.