Symptoms
On a server that is running only one instance ofMicrosoft SQL Server 2008, you open the SQL Server Installation Center. Then, you remove the instance in Add or Remove Programs inWindows Server 2003 or in Program and FeaturesinWindows Server 2008. When you close the SQL Server Installation Center after you remove the instance, you may receive the following error message:

SQL Server Setup has encountered the following error:
Unable to generate a temporary class (result=1).
error CS0006: Metadata file ‘C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\CTP6\x64\Microsoft.SqlServer.Configuration.SqlServer_ConfigExtension.dll’ could not be found
error CS0006: Metadata file ‘C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\CTP6\x64\Microsoft.SqlServer.Configuration.SqlConfigBase.dll’ could not be found
error CS0006: Metadata file ‘C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\CTP6\x64\Microsoft.SqlServer.Chainer.Infrastructure.dll’ could not be found
error CS0006: Metadata file ‘C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\CTP6\x64\Microsoft.SqlServer.Configuration.Sco.dll’ could not be found
error CS0006: Metadata file ‘C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\CTP6\x64\Microsoft.SqlServer.Configuration.Sfc.dll’ could not be found
error CS0006: Metadata file ‘C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\CTP6\x64\Microsoft.SqlServer.Configuration.dll’ could not be found
error CS0006: Metadata file ‘C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\CTP6\x64\Microsoft.SqlServer.Configuration.SString.dll’ could not be found
Error code 0×84B10001.You may also receive this error message in the following scenario:A server is running an instance of a SQL Server 2008 failover cluster.There are no other instances ofSQL Server 2008 or of a SQL Server 2008 failover cluster running on the server.In the SQL Server Installation Center, you remove the last node of the instance of a SQL Server 2008 failover cluster.After you remove the last node, you may receive this error message when you close the SQL Server Installation Center.
Resolution
This problem occurs because the SQL Server Setup Wizard removes the files that are required by the SQL Server Installation Center. When you close SQL Server Installation Center, the SQL Server Installation Center may load these files. However, the SQL Server Installation Center cannot find these files.