Comment (by Miguel Zilhão):

Ah, I see. I think in fact we usually do set all those parameters in most parameter files, so maybe we can proceed as you propose. But there is indeed a danger of breaking some parameter files, yes. Given, as you mentioned, that this issue also occurs in ML_BSSN, maybe we should consider what would be the best generic way of handling this… @Roland Haas do you have any suggestions?

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2487/_evolution_method-leanbssnmol-in-lean-does