FIX: Unexpected null values may appear when you import or refresh data in a PowerPivot for Excel 2010 workbook that was published on a SharePoint site

You may receive some unexpected null values in the result of any one of the following operations:

• You import data from a data source by using Microsoft PowerPivot for Microsoft Excel 2010.
• You refresh data in a PowerPivot workbook that was published on a Microsoft SharePoint site.

This issue occurs because of an error in the encoding logic that is used by the Vertipaq storage engine.

Note The VertiPaq storage engine is used for in-memory multidimensional databases in Excel workbooks. This includes PowerPivot workbooks on a SharePoint site.

Cumulative update information

SQL Server 2008 R2

The fix for this issue was first released in Cumulative Update 6. For more information about how to obtain this cumulative update package for SQL Server 2008 R2, click the following article number to view the article in the Microsoft Knowledge Base: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 R2 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:

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

To download PowerPivot for Excel 2010, visit the following Microsoft Download Center website: