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I have a Swing application and i'm having problems integrating an OpenCV matchTemplate.

This code works fine:

public static void main(String[] args) {
        boolean checkMatchTemplate = ImageSimilarity.checkMatchTemplate("", "");
        System.out.println(checkMatchTemplate);
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    LoginMenu window = new LoginMenu();
                    window.frmLogin.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

But if i put my matchTemplate inside the run method it gives me an error.

public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    boolean checkMatchTemplate = ImageSimilarity.checkMatchTemplate("", "");
                    System.out.println(checkMatchTemplate);
                    LoginMenu window = new LoginMenu();
                    window.frmLogin.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

This is the error:

libpng warning: Application was compiled with png.h from libpng-1.5.12
libpng warning: Application  is  running with png.c from libpng-1.2.50
libpng error: Incompatible libpng version in application and library
OpenCV Error: Assertion failed (corrsize.height <= img.rows + templ.rows - 1 && corrsize.width <= img.cols + templ.cols - 1) in crossCorr, file /home/diogo/Downloads/opencv-2.4.10/modules/imgproc/src/templmatch.cpp, line 70
CvException [org.opencv.core.CvException: cv::Exception: /home/diogo/Downloads/opencv-2.4.10/modules/imgproc/src/templmatch.cpp:70: error: (-215) corrsize.height <= img.rows + templ.rows - 1 && corrsize.width <= img.cols + templ.cols - 1 in function crossCorr
]
        at org.opencv.imgproc.Imgproc.matchTemplate_0(Native Method)
        at org.opencv.imgproc.Imgproc.matchTemplate(Imgproc.java:7637)
(...)

And this is the checkMatchTemplate method:

public static boolean checkMatchTemplate(String path, String template) {

        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

        int match_method = Imgproc.TM_SQDIFF_NORMED;

        Mat img = Highgui.imread("/home/diogo/workspace/AmbiSig/lena.png");
        Mat templ = Highgui.imread("/home/diogo/workspace/AmbiSig/template.png");

        int result_cols = img.cols() - templ.cols() + 1;
        int result_rows = img.rows() - templ.rows() + 1;
        Mat result = new Mat(result_rows, result_cols, CvType.CV_32FC1);

        Imgproc.matchTemplate(img, templ, result, match_method);

        MinMaxLocResult mmr = Core.minMaxLoc(result);

        if (mmr.minVal < thresholdMatch)
            return true;

        return false;
    }

What do I need to do to make the matchTemplate work inside the run method? Thank you in advance :)