Why does one of my project's GUIDs change when I build the project in VS 2005?

Question

For two of my VS 2005 C++ projects, VS wants to write to the .sln file when I build the projects. I have got a number of other VS 2005 C++ projects where this is not the case. It is a problem as due to the fact that we have ClearCase source control integrated with our VS 2005 installations and when we try and run an overnight build via batch files, the build pauses as a ClearCase check out dialog box is displayed.

Looking at what VS is changing in the .sln files, it is the second GUID on the project line.

Before building:

Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "InterCommClientB", "InterCommClientB.vcproj", "{A2AF232A-7F27-4340-81D5-8ABFD10994D2}"

After building:

Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "InterCommClientB", "InterCommClientB.vcproj", "{67BE85B7-3234-484E-88FB-4F0E42096583}"

Any help gratefully received. I am new to VS 2005, as we have only recently migrated from VC++ 6.0, so apologies if I have missed something obvious.

We are running VS 2005 Professional Edition, with SP1 installed.

Regards,

Greg.

Answer 1

I had similar problem. It seems that when converting projects from old versions of VS (like 6 or 2003) VS 2010 is not adding Project GUID to the .vcxproj file. Because of that when you open solution including such project VS will recreate GUID for such project, and will change .sln file but will not change .vcxproj file. So another time you open such solution the situation will be the same and the .sln file may change again.

See this: http://connect.microsoft.com/VisualStudio/feedback/details/586258/missing-projectguid-in-vcxproj-files