MSB3422 Failed to get VC project information through the object model of the VC project object. MSB3425

Question

I get the following errors from MSBuild when trying to build a solution:

C:\dev\MySln.sln : warning MSB3422: Failed to retrieve VC project information through the VC project engine object model. Unable to determine default tool for the specified file configuration. C:\dev\MySln.sln : warning MSB3425: Could not resolve VC project reference "C:\dev\MyProj.vcproj". 

Do you have any ideas on what causes this and how to solve it? I saw other messages about similar but different errors, for example, when the error MSB3422 has a different message and shows "Illegal characters in transit." But I did not see any useful information on how to solve the error, where I say: "It is impossible to determine the default tool for the specified file configuration."

Thanks.

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I found this, but it really doesn't help:

http://social.msdn.microsoft.com/Forums/en-US/msbuild/thread/b470f111-9321-4b43-8bd1-7fcf67c2d402

Answer 1

An employee fixed this problem by re-registering the VC project DLL project:

C: \ Program Files \ Microsoft Visual Studio 9.0 \ VC \ vcpackages \ VCProjectEngine.dll