Egdes: Another possible source of error in ext_bubblepos !

[ΙΩΑΝΝΗΣ ΠΑΝΑΓΙΩΤΟΠΟΥΛΟΣ]

If you try to use ext_bubblepos without PBC the spins along the edges of the sample cant slightly away from the perpendicular direction and this confuses the algorithm.
This canting is minimal and it is not visble in the colour code unless you specifically  choose to color by the z-component only. Yet, since the edges represent a much larger area than the skyrmion itself, it produces an discrepancy between what you see in the image and the calculated value.

I hope this would help someone.

IP