QwtPlot keeps crashing my program - "The program has unexpectedly finished."

[krimster]

And, I have no idea why, nor how to fix it.
( I'm actually pretty sure this is a really newbie problem too...)
This was originally happing in another tutorial I was working on,
and I eventually traced it back to the line:
@ QwtPlot *plot = new QwtPlot();@

Just to make sure, I create a new project to see if I could figure out what it was (not)doing
(no luck)

Everything builds, I'm working in QtCreator v 5.3, using MinGW, and on a windows OS.

main.cpp
@#include "tutorial.h"
#include <QApplication>
#include <qwt_plot.h>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QwtPlot *plotc = new QwtPlot();
return a.exec();

// QApplication a(argc, argv);
// Tutorial w;
// w.show();

// return a.exec();
}
@

.pro file
@
QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = tutorial
TEMPLATE = app

SOURCES += main.cpp
tutorial.cpp

HEADERS += tutorial.h

CONFIG += qwt

#-the graphic library :
INCLUDEPATH += C:/Qt/qwt-6.1.0/src
LIBS += C:\Qt\qwt-6.1.0\lib\libqwt.a
@

tutorial.cpp and tutorial.h I haven't touched
@ //tutorial.cpp

#include "tutorial.h"

Tutorial::Tutorial(QWidget *parent)
: QWidget(parent)
{
}

Tutorial::~Tutorial()
{

}
@

@ //tutorial.h
#ifndef TUTORIAL_H
#define TUTORIAL_H

#include <QWidget>

class Tutorial : public QWidget
{
Q_OBJECT

public:
Tutorial(QWidget *parent = 0);
~Tutorial();
};

#endif // TUTORIAL_H
@

[SGaist]

Hi and welcome to devnet,

Are you sure your qwt dll's can be found ?

[8Observer8]

I have the same question here: http://qt-project.org/forums/viewthread/46723/