When you run a command-line script to install an instance of SQL Server 2008 R2 at a command prompt, the default instance name is incorrectly used if you specify the instance name by using /INSTANCENAME
parameter in the script.
Cumulative update information
The fix for this issue was first released in cumulative update package 3. For more information about how to obtain this cumulative update package for SQL Server 2008 R2 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:
Cumulative update package 3 for SQL Server 2008 R2 Service Pack 1
Because the builds are cumulative, each new update release contains all the hotfixes and all the security updates that were included with the previous SQL Server 2008 R2 Service Pack 1 update release. We recommend that you consider applying the most recent update release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 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.
For more information about how to install SQL Server 2008 R2 at the command prompt, visit the following MSDN website: