.net – How to fix this error in VS 2005? “The project file cannot be loaded. The application for project … is not installed”

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How do I fix this error in Visual Studio?

"The project file cannot be loaded. The application for project … is not installed"

I have copied a whole project onto my PC, both into My Documents/Visual Studio and into inetpub/wwwroot, but when I try to open the project in Visual Studio, it tries to open just 1 file .vssproj and gives me error messages, like : "The project file cannot be loaded. The application for project … is not installed.". What am I doing wrong?

The VS edition is 2005 as are all the projects aI am trying to load.

Thanx in advance.

Best Answer

If it a web application project rather than a website and you haven't upgraded to Service Pack 1 you'll get this error.