!!! I have caught an exception which is:
Erreur dans readheaders().
Not enough loci of type <A> found in the datafile from position 0. This is perhaps due to the elimination of 2 monomorphic loci from the original dataset.
I will try to save current RNGs' states.
I have saved current RNGs' states into singlepop/BeeH2_2019_4_6-1/RNG_state_0000.bin