This code looks very interesting.
I am using v3.0 and I possibly hit a bug/problem. It seems to me that, for different cost matrices (coming from the underlying problem with a varying size) the solution switches between being in row mode and col mode.
I don't see any parameter/switch to control this behavior, is it intended to be like that? how can I get the solution always in term of e.g. col indices? Fabio