Comment (by Peter Diener):

I tried adding the presync_mode parameter and got an almost immediate abort:

WARNING level 0 from host DESKTOP-PLSCBCI.localdomain process 0
in thorn Carpet, file /mnt/e/diener/Cactus/configs/gallery/build/Carpet/PreSync.cc:260:
-> Required read for TMUNUBASE::eTtt (rl=0) not satisfied. Have Nowhere and require Everywhere missing Everywhere at the start of routine ML_BSSN::ML_BSSN_ADMBaseInterior. Current valid state:
Valid entries: TMUNUBASE::eTtt (rl=0) Nowhere TMUNUBASE::eTtt (rl=1) Nowhere TMUNUBASE::eTtt (rl=2) Nowhere TMUNUBASE::eTtt (rl=3) Nowhere TMUNUBASE::eTtt (rl=4) Nowhere.
cactus_gallery: /mnt/e/diener/Cactus/configs/gallery/build/Carpet/helpers.cc:275: int Carpet::Abort(const cGH*, int): Assertion `0' failed.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2175/test-single-stable-neutron-star-example