ImagePainter-problem painting some specific lines

ImagePainter is fantastic and everything but I seem to have a bit of a problem displaying some lines.
Could very well be me not understanding something.

Test case showing the problem:

package com.cis.pipesandstuff.manictubes2.test;

import com.jme3.app.SimpleApplication;
import com.jme3.math.ColorRGBA;
import com.jme3.texture.Image;
import com.jme3.texture.image.ColorSpace;
import com.jme3.util.BufferUtils;
import com.zero_separation.plugins.imagepainter.ImagePainter;

/**
 *
 * @author jo
 */
public class TestImagePainter extends SimpleApplication {

    public static void main(String[] args) {
        TestImagePainter app = new TestImagePainter();
        app.start();
    }
    
    @Override
    public void simpleInitApp() {
        
        Image image = new Image(Image.Format.BGR8, 642, 692, BufferUtils.createByteBuffer(642 * 4 * 692), null, ColorSpace.Linear);
        ImagePainter imagePainter = new ImagePainter(image);
        
        imagePainter.paintLine(
                                561, 211,
                                461, 69,
                                1, ColorRGBA.Blue, ImagePainter.BlendMode.SET);
    }
    
}

Exception:

java.lang.IllegalArgumentException: x and y must be inside the image dimensions
	at com.jme3.texture.image.DefaultImageRaster.rangeCheck(DefaultImageRaster.java:54)
	at com.jme3.texture.image.DefaultImageRaster.setPixel(DefaultImageRaster.java:116)
	at com.zero_separation.plugins.imagepainter.ImagePainter.paintPixel(ImagePainter.java:528)
	at com.zero_separation.plugins.imagepainter.ImagePainter.paintLine(ImagePainter.java:451)
	at com.cis.pipesandstuff.manictubes2.test.TestImagePainter.simpleInitApp(TestImagePainter.java:32)
	at com.jme3.app.SimpleApplication.initialize(SimpleApplication.java:227)
	at com.jme3.system.lwjgl.LwjglAbstractDisplay.initInThread(LwjglAbstractDisplay.java:131)
	at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:212)
	at java.lang.Thread.run(Thread.java:745)

To me, x and y are inside the image dimensions? A’m I wrong?

Edit: works fine most of the time… I use it to create a top view image of my track to help me create it, and it works fine with other tracks (values).