Biztalk 2009 error: project creation failed in visual studio 2008

I’m had to do some biztalk 2009 development on my machine, but it already had visual studio 2010 installed. So I had to install VS2008, which went better than I hoped (did not have to do an uninstall of 2010).

So I had my biztalk 2009 and my Visual Studio 2008 installed and was ready to go when I came across a problem. When I tried to open an existing or create a new Biztalk project I got this error:

Creating project ‘BizTalk project name’… project creation failed.


After some google-fu I found a lot of people experiencing the same problem and even an msdn page about my problem. All of the evidence was correct. I had installed VS2008 SP1   after I installed biztalk.

From the MSDN page:

When Visual Studio 2008 is repaired or when a Visual Studio 2008 update is installed, the value of the following registry entry is changed from csproj;btproj to csproj:

  • For 32-bit versions of Visual Studio 2008:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\9.0\Projects\{FAE04EC0-301F-11d3-BF4B-00C04F79EFBC}\PossibleProjectExtensions
  • For 64-bit versions of Visual Studio 2008:HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\9.0\Projects\{FAE04EC0-301F-11d3-BF4B-00C04F79EFBC}\PossibleProjectExtensions

The problem was that I did not have a PossibleProjectExtensions registry key. I added it, with the correct values. Same error. I repared biztalk. Same error. I restarted multiple times. Same error.

I tried to set the registry key to the value it should have been after an update of Visual Studio (only ‘csproj’) and after doing a repare of Biztalk then I found it changed the value to the correct value. Still, the same error…

So I gave up for now, lost too much time on it already. I’m developing biztalk on a different (virtual machine). Still if anyone has found a solution or experienced the same problem let me know, maybe we could start a self help group…