ERROR from host r168c12s01.marconi.cineca.it process 0

  while executing schedule bin CCTK_EVOL, routine PunctureTracker::PunctureTracker_Track

  in thorn PunctureTracker, file /marconi/home/userexternal/gcrotti0/EinsteinToolkit/ET_2018_09/Cactus/arrangements/EinsteinAnalysis/PunctureTracker/src/puncture_tracker.cc:204:

  -> Shift at puncture #0 is (-nan,-nan,-nan).  This likely indicates an error in the simulation.

Something is wrong with the metric; indeed the lapse function gets larger than 1. We have 9 refinement levels on the black hole, with a resolution of 0.045 on the finest grid. The initial data have been computed as to get a mass ratio = 3; so the black hole mass is ~4 solar masses. The black hole is non-spinning.

Thanks,

Bruno