Commerce Server 2009 + Windows 2008 R2 + Alias

If you get a strange error running Sharepoint Comerce Server Wizard at unpacking or having problems running PUP.exe and have an ALIAS configured for Sql, try adding the alias to the hosts file. This solved some problems. It seems PUP.exe uses named pipes to access Sql, go figure..

An error has occurred (80004005): [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied.

More detail on the MSDN Forum: http://social.msdn.microsoft.com/Forums/pt-BR/commserver2009/thread/2b2cce1e-189b-42ff-ad4a-1282552e69f8