Error writing to invalid argument

[Jyothi]

Hii iam getting the following error while building the just sample project. i found solutions like
i) shadow build
ii)create debug and release foler
iii) remove \ after the lat cpp or .h file in .pro

tried all those but no result.
is there any solution for this? please help me

[jsulm]

@Jyothi Do you really get this when you build the projects? If so then please post the whole compiler output including the very first warning/error.
Also, what Qt version and compiler do you use?

[Jyothi]

Hi,
yes usually i will get this error. But every time i will uninstall and install the QT again. But this is not always the correct solution. i just need a permanent solution for this. Please help me to solve this.

compiler output:

[Christian Ehrlicher]

Fix your main.cpp - the compiler tells you where you made an error so fix it.

[Jyothi]

hi, nothing written in man.cpp. its just a sample qt deafult cpp file only

[JonB]

@Jyothi
Have a read of https://stackoverflow.com/questions/42873311/error-writing-to-invalid-argument to see if anything there is your situation.

[Christian Ehrlicher]

Then the error is in mainwindow.h and the compiler can only give a follow-up error because you miss a ) in there.

[Jyothi]

@JonB

yes sir,

tried those but no use

[JonB]

@Jyothi
Then you should look at your mainwindow.h as suggested by @Christian-Ehrlicher. If you choose to post it here, please paste the text from the file, not a screenshot.

[Jyothi]

Hi,

this is my mainwindow.h file

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();

private:
Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

[JonB]

@Jyothi
I cannot see anything wrong there.

I really expected something from that stackoverflow post I referred you to to be at issue, but you say not. You might want to paste your .pro file because of one of the tips there?

Otherwise I can only suggest you start a fresh project in a fresh directory. Do not even define your own MainWindow. Start with just a QWidget or a QMainWindow. In fact, you could change your existing program to use a QMainWindow instead of MainWindow, and #include <QMainWindow> in place of #include "mainwindow.h". Does that work? Then build back up to what you have now.