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Consider the following scenario:

  • You have a Microsoft SQL Server or Microsoft Azure SQL database that contains tables that are formatted to include variable-length binary data (varbinary) columns.

  • The varbinary columns contain data whose size is equal to or larger than 4,116,480 bytes.

  • You create a data-tier application (DAC) package (.dacpac file together with data or with a .bacpac file) from the database by using the Microsoft SQL Server 2012 Data-Tier Application Framework (DACFx).

In this scenario, the data in the DAC package may differ from the data in the original database.


To resolve this problem, install the updated release of DACFx that is described in the following section. Then, re-create the DAC package for the database that was affected by this problem.

Update information

The updated release of DACFx is available for download from the Microsoft Download Center:

Download Download the package now.For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available when the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.


The SQL Server 2012 Data-Tier Application Framework requires Microsoft SQL Server System CLR Types (SQLSysCLRTypes.msi) and Microsoft SQL Server Transact-SQL ScriptDom (SQLDOM.msi). These are available on the Microsoft Download Center website that is mentioned in the "Update information" section.

Restart requirement

You do not have to restart the computer after you apply this update.

Update replacement information

This update replaces Microsoft SQL Server 2012 Data-Tier Application Framework (March 2013).


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

More Information

For more information about DAC pagkages, see Data-tier Applications.

For more information about software update terminology, see Description of the standard terminology that is used to describe Microsoft software updates.

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