if (CCTK_EQUALS(initial_lapse, "Meudon_Bin_NS")) { 
      if (CCTK_EQUALS (initial_dtlapse, "Meudon_Bin_NS")) {
        CCTK_INFO ("Calculating time derivatives of lapse");
        set_dt_from_domega (CCTK_PASS_CTOC, alp, dtalp, omega);
      } else if (CCTK_EQUALS (initial_dtlapse, "none") or CCTK_EQUALS(initial_dtlapse,"zero")) {
        // do nothing
      } else {
        CCTK_WARN (CCTK_WARN_ABORT, "internal error");
      }
    }

--
Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2631/meudon_binns-fails-if-initial_dtshift-or