Trying to run default QT Plain C++ App -> -1073741515



  • Hello,

    complete newby here, I am using QT, version 5.9.1 for Windows. I installed it with the standard settings.

    Then I created a "Plain C++ application" with the "Desktop Qt 5.9.1 MSVC2015 64bit" Kit (the only available one), which then creates a simple main.cpp:

    #include <iostream>
    
    using namespace std;
    
    int main() {
       cout << "Hello World!" << endl;
       return 0;
    }
    

    When I then press Ctrl+R, a console window opens, but it only says, I should press Return to close the window, no Hello World.

    In the output panel in QT I read:

    Starting C:\Users\user\QTProjects\build-plainConsole-Desktop_Qt_5_9_1_MSVC2015_64bit-Debug\debug\plainConsole.exe...
    C:\Users\user\QTProjects\build-plainConsole-Desktop_Qt_5_9_1_MSVC2015_64bit-Debug\debug\plainConsole.exe exited with code -1073741515
    

    Which, as I already found out, implies, that some library is missing. Shouldn't QT have configured the necessary dependencies? What am I missing?

    I already read here in the forum that some paths have to be added in the PATH environment variable. I do wonder, why the installer of QT did not add those, but anyway. I added the two bin paths, which I found in the Qt installation folder to the PATH environment variable, but it didn't change the outcome:

    C:\Qt\5.9.1\msvc2015_64\bin
    C:\Qt\5.9.1\winrt_x64_msvc2017\bin
    

    I am confused that not even the default project is running on its own after a plain Qt installation.



  • Hi, that error means some DLL was not found (or the wrong kind was found, i.e. without debugging information).

    You can try to compile your app in release mode.
    Also test by opening a CMD window and manually try to start your program, for example:
    C:>C:\Users\user\QTProjects\build-plainConsole-Desktop_Qt_5_9_1_MSVC2015_64bit-Debug\debug\plainConsole.exe

    P.S. No changes or editing of the PATH environment variable is needed for Qt to work.



  • Hi,

    thanks for the hints. So I opened a CMD window and tried to run plainConsole.exe manually. An error window pops up and says, that the 'ucrtbased.dll' is missing. I cannot find such a file anywhere on my computer.

    I also compiled my project in release mode. I switched to release mode and pressed Ctrl+R again. This time in the opened console window I see the "Hello World" and in the out panel it says, that the application ended with code 0.

    So does this mean, that only my debug configuration is somehow broken?



  • @hskoglund said in Trying to run default QT Plain C++ App -> -1073741515:

    P.S. No changes or editing of the PATH environment variable is needed for Qt to work.

    Thats actually not always true, I for example had to add the MSVC Debugger manually for 5.9.1 in the project settings



  • @J.Hilk Yeah you're right, debuggers needs that.



  • Correction,

    eventually Windows did find multiple instances of the ucrtbased.dll. They are located in the C:\Programs and C:\Programs (x86)\ folders and there deep in the Microsoft SDKs and Windows Kits folders respectively.



  • @ghost23 'ucrtbased.dll' should be there in your C:\Windows\System32 folder, it's a part of the MSVC2015 installation.



  • OK, so now that I found those DLLs, what should I do next?



  • @ghost23 Since ucrtbased.dll is in C:\WIndows\System32, which always in hardwired into the PATH env. variable, no further action should be needed.
    But since it fails, try doing the exact same thing inside your Visual Studio 2015, i.e. building a simple 64-bit console app in debug mode. It should fail in the same way in Visual Studio...

    Edit: forgot to mention, also try disabling your anti-virus program (if you have one).



  • Hi,

    well, as I said above, the ucrtbased.dll is not in my System32 folder, but in a subfolder in C:\Program Files(x86)\Windows Kits...

    I also tried disabling my anti-virus program, but it didn't make a difference.


  • Moderators

    @ghost23 You should not add anything to PATH - it is not needed!
    It should work.
    You're using QtCreator?


  • Moderators

    @J.Hilk said in Trying to run default QT Plain C++ App -> -1073741515:

    Thats actually not always true, I for example had to add the MSVC Debugger manually for 5.9.1 in the project settings

    But for that you do not need PATH, right?



  • @jsulm Nope. you need to add the Windows(10) Kit binary folder to the Path variable
    in my case

    C:\Program Files (x86)\Windows Kits\10\bin\x86


  • Moderators

    @J.Hilk I'm not using Microsoft compiler, but can't you just add the absolute path to the debugger in QtCreator?



  • @jsulm said in Trying to run default QT Plain C++ App -> -1073741515:

    @J.Hilk I'm not using Microsoft compiler, but can't you just add the absolute path to the debugger in QtCreator?

    If I'm not mistaken, than changing /adding stuff in your path variable via Qt-Creators project settings
    0_1506512981657_path.PNG

    is exactly that. My global System PATH variable is unchanged.



  • @ghost23 Googled a bit, seems that ucrtbased.dll can indeed be missing from System32. In this thread the last post says the solution was to: "... uninstall and then install the Common Tools.."



  • Hi,

    oh so many replies :)

    So, yes I am using QTCreator. So, I have added the path to the x86 version of the ucrtbased.dll to the PATH variable in the System environment variables.

    A little bit has changed, when doing so. When I run the .exe manually in a CMD window, now I get the error "0xc000007b".

    IN QTCreator, though, I still get the same outcome, as before, although in the Project settings, I can see, that the Path to the ucrtbased.dll is also added.



  • @ghost23 Close, but no cigar. Error "0xc000007b" means that your 64-bit console program is trying to load the 32-bit version of ucrtbased.dll :-( You need to find a 64-bit flavor of ucrtbased.dll on your computer.



  • Hi,

    ok, so this took some time. Yesterday I found, that I had installed a mess of Microsoft and Windows SDKs and I thought, let's clean this up. So I uninstalled all those SDKs. Then I read the Qt documentation again and it says, that I should install a compiler as a requirement for Qt. One of the recommendations is to use Visual C++ build tools. So I have installed the Visual C++ Build Tools 2015.

    Then I start Qt, but I cannot compile my plain c++ app in Debug mode, because Qt cannot find a debugger. After some investigation, I find, that the Visual C++ build tools 2015 do not contain a debugger. Why isn't that mentioned in the documentation?

    So after somer further googling I find, that the Windows SDK comes with a debugger (the cdb.exe). So I install the Windows SDK. Now I have a debugger.

    Then, when I tried compile my app in debug mode, I got this error:

    LINK : fatal error LNK1158: cannot run 'rc.exe'
    

    So, for some reason, the place, where the rc.exe is, wasn't in my PATH. Added it, now finally, I can compile both the debug and the release version and run them without errors.

    Man, I have to say, I haven't even written one line of code as of now, but I am already exhausted.

    Thanks for all the help, though. Much appreciated.



  • @ghost23 jup, run into exatcly the same issue.
    But the advantage of the MSVC compiler is, that it's about 5 times faster (on Windows) than mingw, so you'll have that time back in a couple of weeks :)

    You should set the topic to solved, if you managed to solve your problem :p


  • Moderators

    @ghost23 "I cannot compile my plain c++ app in Debug mode" - you don't need a debugger to build in debug mode. You only need it if you want to debug.

    "Why isn't that mentioned in the documentation?" - it is: http://doc.qt.io/qtcreator/creator-debugger-engines.html


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