I'm trying to use AHFinderDirect to find the apparent horizon in the de Sitter metric, implemented in the Exact thorn in comoving coordinates. I tried a few things but cannot get it to work. Have someone tried something similar, i.e. using the AHFD in cosmological spacetimes instead of BHs? Below I attach a typical parfile I used

Thanks!

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# flesh
cactus::cctk_itlast = 0

ActiveThorns = "PUGH"
driver::ghost_size = 3
driver::global_nx = 120
driver::global_ny = 120
driver::global_nz = 120 ##57

ActiveThorns = "CoordBase SymBase CartGrid3D"
grid::avoid_origin = "false"
grid::type = "byspacing"
grid::dxyz = 0.2

ActiveThorns = "ADMBase ADMCoupling StaticConformal CoordGauge SpaceMask Exact"
ADMBase::initial_lapse = "exact"
ADMBase::initial_shift = "exact"
ADMBase::initial_data = "exact"
ADMBase::lapse_evolution_method = "exact"
ADMBase::shift_evolution_method = "exact"
ADMBase::metric_type = "physical"
Exact::exact_model = "de Sitter+Lambda"
Exact::de_Sitter_Lambda__scale = 0.50


########################################

ActiveThorns = "IOUtil"
IOUtil::parfile_write = "no"

########################################

ActiveThorns = "AEILocalInterp PUGHInterp PUGHReduce SphericalSurface AHFinderDirect"

AHFinderDirect::print_timing_stats = "true"

AHFinderDirect::output_Theta_every = 1
AHFinderDirect::h_base_file_name     = "dS.h"
AHFinderDirect::Theta_base_file_name = "dS.Theta"

AHFinderDirect::N_horizons = 1
AHFinderDirect::origin_x[1] = 0.0
AHFinderDirect::origin_y[1] = 0.0
AHFinderDirect::origin_z[1] = 0.0

AHFinderDirect::initial_guess_method[1] = "coordinate sphere"
AHFinderDirect::initial_guess__coord_sphere__x_center[1] =  0.0
AHFinderDirect::initial_guess__coord_sphere__y_center[1] =  0.0
AHFinderDirect::initial_guess__coord_sphere__z_center[1] =  0.0
AHFinderDirect::initial_guess__coord_sphere__radius[1] = 1.0
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