Upgrading to SQL Server 2005 fails if .Net framework 3.5 SP1 or later is installed


Consider the following scenario:
  • You are currently running a SQL Server instance prior to SQL Server 2005 on your system.
  • You install .Net Framework 3.5 SP1 or later on this system.
  • You try to upgrade your SQL Server instance to SQL Server 2005 (any edition).

In this scenario, the upgrade process may fail with the error message below:

SQL BPA command line has encountered a problem and needs to close. We are sorry for the inconvenience.
If you are in the middle of something, the information you were working on might be lost.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.


Use the following procedure to workaround the problem:

  1. Create a file named bpacmd.exe.config with the following text 
  2. <configuration>
          <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
             <probing privatePath="bin"/>
  3. Copy bpacmd.exe.config file to the following location:
  4. Program Files/Microsoft SQL Server/90/Setup Bootstrap/BPA
  5. Retry the upgrade operation.