Hi, sorry, there is a lack of documentation here. Empty core lines refer to lines that are entirely filled with #s, in essence cores that do not really exist for the displayed machines. In the screenshot, you also have unused cores (on the left and right hand side of the screen), so it wouldn't make sense to just remove them, it would draw an unreliable image of the cluster. You can always transpose the matrix (and maybe your monitor, if possible!!) ;)

ah, thanks for clarification, not a bug then.

@sbutcher
stay tuned, I'm adding a double -rr to also remove ####_______ this kind of lines. That real estate is valuable!!

@sbutcher if you want to try it out,, check PR #271
It does what you expected, plus you should be able to toggle between those states, showing all cores, hiding corelines full of '#'s and hiding corelines with '#'s and '_'s.

fixed in latest develop branch

works for me , thanks guys!