I always get the error code 255 but why?!

[marachli]

What are the reasons that cause breaking your program during the compiling then it exit with code 255 ?

[marachli]

another time (I changed nothing) and the program exited with the code -1073741819 .
Has this a realtionship with the memory ?

[andre]

You really, really have to provide more information than this. Did you try a debugger to see what goes wrong where?

[asdisprjonar]

@marachli
I'm having the same problem! Well in reverse order (first I got error -1073741819 and then after minor changes error 255), were you able to fix it?

[Gus78]

After an upgrade to Qt_5_4_2_MinGW_32bit, (Qt5.5), on a updated win8 computer, I consistently get the error exited with code 255.

I tried a clean qt widget application from the template with no changes at all:

mainwindow.cpp:
#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}

MainWindow::~MainWindow()
{
delete ui;
}

mainWindow.h:
#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

main.cpp:
#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();

return a.exec();

}

pro file:
QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = untitled2
TEMPLATE = app

SOURCES += main.cpp
mainwindow.cpp

HEADERS += mainwindow.h

FORMS += mainwindow.ui

Result:
Starting C:\Users\Gustaf\build-untitled2-Desktop_Qt_5_4_2_MinGW_32bit2-Debug\debug\untitled2.exe...
C:\Users\Gustaf\build-untitled2-Desktop_Qt_5_4_2_MinGW_32bit2-Debug\debug\untitled2.exe exited with code 255

Thanks in advance,

[mrjj]

Hi and welcome
make sure to try disable virus scanner and test. I had issues with Avast.
Do the program run and when you exit it gives code?
Or don't it run at all?

[Pogi]

@mrjj

i also get the problem, the program doesnt run at all, and when i tried to use the debugger of qt creator a window keep popping up that says
An exception was triggered:
Exception at 0x7718d4f2, code: 0x0000135: DLL not found, flags=0x0
During startup program exited with code 0x0000135

[mrjj]

@Pogi said:

DLL not found,

you code try to load some DLL that is not around.

[Gus78]

For me, the issue was that the app couldn't access the DLL (that existed). I rebuilt Qt statically and that solved the issue.

Maybe a dirty solution, but now I can compile and run the app.

[mrjj]

@Gus78
Hi
well static linking is not dirty in any ways :)
However the Qt licencing requires statically linked programs to be open source
or buy a licence for Qt so often its not a solution for most.
But building it static will make it shut up about any DLLS :)