IllinoisGRMHD schedules the conservative-to-primitive methods in the group AddToTmunu. This group is not added to the scheduler unless TmunuBase::stress_energy_at_RHS = "yes". If this parameter is set to no, IllinoisGRHMD doesn’t do the conservative-to-primitive step, quickly resulting in NaNs.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2497/illinoisgrmhd-is-incompatible-with-setting