# Friday, 25 February 2011
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Visual Studio 2010 or Visual Web Developer Express 2010 or Visual Phone Developer Express 2010 that matches the language version of Silverlight Tools 4 must be installed before installation of Silverlight Tools can continue.

I was running into the above error when I tried to install Silverlight 4 Tools for Visual Studio 2010 whether I did it from the downloaded install or via the Web Platform Installer.

Downloaded Silverlight4_Tools.exe error message:

image 

WPI:

image

If you open the first log file you will find the error at the bottom:

Installation Blockers:
    1) Visual Studio 2010 or Visual Web Developer Express 2010 or Visual Phone Developer Express 2010 that matches the language version of Silverlight Tools 4 must be installed before installation of Silverlight Tools can continue.  Silverlight Tools is available in other languages at <A HREF="http://go.microsoft.com/fwlink/?LinkId=177432">http://go.microsoft.com/fwlink/?LinkId=177432</A>.

When I looked online for this error I was only seeing references to the Beta and Release Candidates of Visual Studio 2010.

After a little thought, I decided to open up the readme file for the SP1 Beta of Visual Studio 2010 that I installed a while back and there was the answer:

2.1.4. Error when you try to install Silverlight 4 Tools for Visual Studio 2010 on Visual Studio 2010 SP1 Beta

An error message may appear when you try to install Silverlight 4 Tools for Visual Studio 2010 on Visual Studio 2010 SP1 Beta. 

To resolve this issue:

Because Silverlight 4 Tools for Visual Studio 2010 (http://www.microsoft.com/downloads/en/details.aspx?FamilyID=b3deb194-ca86-4fb6-a716-b67c2604a139&displayLang=en) is included in Visual Studio 2010 SP1 Beta, you do not have to install Silverlight 4 tools separately.  Also, you do not have to uninstall Silverlight 4 Tools for Visual Studio 2010 before you install Visual Studio SP1 Beta.

There you have it.  If you installed VS 2010 SP1 Beta then you already have the Silverlight 4 Tools.  How’s that for a descriptive error message. :-)

Happy Coding!

Posted 02.25.2011  #    Comments [6]  |