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Hi, I'm using the code from "https://help.ubuntu.com/community/OpenCV" in the C++ section, and I'm having trouble with the following code:

#include "opencv2/core/core_c.h"
#include "opencv2/core/core.hpp"
#include "opencv2/flann/miniflann.hpp"
#include "opencv2/imgproc/imgproc_c.h"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/video/video.hpp"
#include "opencv2/features2d/features2d.hpp"
#include "opencv2/objdetect/objdetect.hpp"
#include "opencv2/calib3d/calib3d.hpp"
#include "opencv2/ml/ml.hpp"
#include "opencv2/highgui/highgui_c.h"
#include "opencv2/highgui/highgui.hpp"
using namespace cv;

int main()
{

    Mat img = imread("/home/courtneym/Pictures/index.jpeg",CV_LOAD_IMAGE_COLOR);
    imshow("opencvtest",img);
    waitKey(0);

    return 0;
}

I keep getting this error when I try to run it:

OpenCV Error: Assertion failed (size.width>0 && size.height>0) in imshow, file /home/courtneym/opencv/modules/highgui/src/window.cpp, line 276 terminate called after throwing an instance of 'cv::Exception' what(): /home/courtneym/opencv/modules/highgui/src/window.cpp:276: error: (-215) size.width>0 && size.height>0 in function imshow

Aborted (core dumped)