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  • C++ MFC UpdateData() causes debug assertion failure

    From Nightfox to All on Mon Jul 11 16:47:34 2011
    Hi all -

    I'm working on a C++ application for Windows written with MFC that someone
    else originally developed. It's a dialog-based application, and there are
    many places in the code where it calls UpdateData() to synchronize the values of member variables and controls on the GUI. When I compile and run the program in debug mode, these calls to UpdateData() cause a debug assertion failure, which cause the program to stop running. Does anyone know what might cause this and how it might be fixed?

    Nightfox
  • From Digital Man@VERT to Nightfox on Tue Jul 12 18:51:16 2011
    Re: C++ MFC UpdateData() causes debug assertion failure
    By: Nightfox to All on Mon Jul 11 2011 04:47 pm

    Hi all -

    I'm working on a C++ application for Windows written with MFC that someone else originally developed. It's a dialog-based application, and there are many places in the code where it calls UpdateData() to synchronize the values of member variables and controls on the GUI. When I compile and run the program in debug mode, these calls to UpdateData() cause a debug assertion failure, which cause the program to stop running. Does anyone know what might cause this and how it might be fixed?

    Run it in your debugger/IDE and look at the callstack after the assertion. That will show you the point in the code (and the contents of variables/memory) when the assertion occurs.

    digital man

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