parallel use of periodic and manual checkpoints may cause time step size zero
I faced with @leopold.stadler the problem that the parallel use of periodic and manual checkpoints caused a time step size of zero, since one of the manual check points coincided with a periodic check point. The zero time step again caused the abortion of the simulation.
I've adapted my code, to avoid the coinciding of periodic and manual checkpoints. Nevertheless, I would suggest to adapt also dumux to avoid this problem.