I am running VS2010 Pro on Win 7 Pro. Now, when I attempt to open and work on an application (nopCommerce v1.90) designed to run on ASP.NET 4. I get an error that says my "project is targeting ASP.NET 4.0 which is not installed on this machine." ASP.NET 4 is installed and I have confirmed it with the Setup verifier. I have used the Setup Verifier to check that all versions of ASP.NET from 2.0 to 4.0 are installed correctly on my machine. The error code also prompts me to install .NET 4 via the Web Platform Installer. If I select that option I eventually get a choice to "Repair" or "Remove" ASP.NET 4. I selected "Repair" which completes successfully but changes nothing. The reason I am reluctant to select "Remove" is that when I run the application on "localhost" it works fine. I also have webmatrix and lightswitch installed on this machine. I'm not sure what to do next. Is there some configuration file that tells VS2010 that .NET 4 is installed? Any suggestions will be greatly appreciated.
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Laurence W. Stewart
dalarry.com
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"The technology of a sufficiently advanced civilization will be virtually indistinguishable from magic."

Hi there,

As I suggested in my other message, did you try reinstalling or reparing Visual Studio itself? If the app runs fine locally, I think the .NET Framework 4 is fine, but Visual Studio has some issues.

Also, can you post the exact error message you're getting in Visual Studio 2010?

Cheers,

Imar

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Imar Spaanjaars
http://Imar.Spaanjaars.Com
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Author of Beginning ASP.NET 4.5 : in C# and VB, Beginning ASP.NET Web Pages with WebMatrix
and Beginning ASP.NET 4 : in C# and VB.
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Hi Imar:

I'd hoped to avoid that because my original VS2010 install was so long and arduous but I decided I had to. Last night I downloaded and ran the VS2010 uninstall utility which reported that it completed successfully. I then mounted the VS2010 install iso on a Virtual Drive and started the reinstall of VS2010 Pro about midnight. About 3:00am it looked to be about 85% through the install of the main program and about 1/3rd of the way through the list of programs to be installed. It was going so slowly that I went to bed. When I got up this morning about 9:00 am it was still at the same point. Task Manager said everything was still running but I killed it anyway, have rebooted and will try again.

My impression of working with Visual Studio/Microsoft web products as compared to Abobe web products is that I seem to spend most of my time diagnosing and fixing very esoteric problems. Obviously, there are lots of folks who work successfully with them. It just hasn't been my expeerience to date.

Thanx for your interest.

It took several runs at it but I've got VS2010 uninstalled and reinstalled after a fashion and it seems to work for the most part. It seems to recognize ASP.NET 4 now but coughs up two very convoluted and strange errors which I will post in the Microsoft forums.

Thanx for your help. I'm really enjoying your book again. You really do have a gift for making complex subjects accessible and understandible.