Qt and LNK1104 cannot open file

Question

I am trying to accomplish the "hello world" tutorial with Qt 5.0.2 for Windows 64-bit (VS 2012, 500 MB) (Info). However when I press Run the project I have an LNK1104: cannot open file 'debug/Hello.exe' error. However I see that this file is created under project folder "F:\QT\Hello\build-Hello-Desktop_Qt_5_0_2_MSVC2012_64bit-Debug". Thank you in advance

Main.cpp

#include <QApplication>
#include <QPushButton>

int main(int argc, char **argv)
{
    QApplication app (argc, argv);

    QPushButton button;
    button.setText("Hello world !");
    button.setToolTip("heheheheheheheh");
    button.show();

    return app.exec();
}

Hello.pro

TEMPLATE = app
TARGET = Hello

QT = core gui
QT += widgets

SOURCES += \
    main.cpp

Answer 1

Most likely cause for the problem: .exe file of your program is still running. Check with Task Manager.End this process from task manager and again try to built it.It will definitely run.