Qt5 project in VS2010 cannot be built: Error MSB6006

[Brokenmind]

You're right, changing the ".\GeneratedFiles\..." to an absolute path solved the above issue, but this cannot be an acceptable solution to the problem, right?
Furthermore, the build process seems to work now, but the program crashes when attempting to run it:

Debug Error!
 
Program: C:\TestProject\Win32\Debug\TestProject.exe
Module: 5.0.2
File: kernel\qguiapplication.cpp
Line: 782
 
Failed to load platform plugin "windows". Available platforms are:
 
(Press Retry to debug the application)

Debug Error!

Program: C:\TestProject\Win32\Debug\TestProject.exe
Module: 5.0.2
File: kernel\qguiapplication.cpp
Line: 782

Failed to load platform plugin "windows". Available platforms are:

(Press Retry to debug the application)

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Retrying gets me to "free.c" in mvscr100d.dll, where apparently some heap couldn't be freed.

I could not locate the file qguiapplication.cpp on the whole file system... Now I can either try to figure out why the relative path in MOC_DIR is not working and why changing it to an absolute path makes the remaining program unusable, or I can try to fix the heap exception thrown in a file which does not exist. But I have no clue about both. Seriously, what's going on here?

[ChrisW67]

The error is telling you that the runtime environment of your process cannot find the platform plugin. The platform plugin and source file is part of Qt5.
If you are running the program in your IDE then you have a broken installation.
If you are running the program in a deployed environment then you have failed to deploy the necessary plugin(s).


The relative MOC_DIR path is not inherently wrong. That path is relative to the current working directory in which qmake is run. If your IDE is running qmake with the current working directory set to somewhere that cannot be written then there is a misconfiguration of either the IDE or the project settings (e.g. a broken shadow build path).