Hello Cactus users,

I am new to Einstein Toolkit. I want to write a simple parameter file, according to my understanding of Thorn. When I use the Thorn in EinsteinAnalysis, I encountered a warning (Level 1) and CarpetIOBasic can't output normally.

I couldn't find the reason for the warning, because the warning message is brief.

------------------------ par file -----------------------

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

# Flesh parameters

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

Cactus::terminate = "iteration"

Cactus::cctk_itlast = 0

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

# Coordinate

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

ActiveThorns = "Carpet CarpetLib CoordBase CartGrid3D"

Carpet::domain_from_coordbase = yes

CartGrid3D::type = "coordbase"

CartGrid3D::domain = "full"

CoordBase::domainsize = "minmax"

CoordBase::xmin = -20.0

CoordBase::ymin = -20.0

CoordBase::zmin = -20.0

CoordBase::xmax = +20.0

CoordBase::ymax = +20.0

CoordBase::zmax = +20.0

CoordBase::dx = 1

CoordBase::dy = 1

CoordBase::dz = 1

driver::ghost_size = 3

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

# Boundary

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

ActiveThorns = "boundary symbase"

CoordBase::boundary_size_x_lower = 3

CoordBase::boundary_size_y_lower = 3

CoordBase::boundary_size_z_lower = 3

CoordBase::boundary_size_x_upper = 3

CoordBase::boundary_size_y_upper = 3

CoordBase::boundary_size_z_upper = 3

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

# Initial Condition

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

ActiveThorns = "ADMBase"

ADMBase::initial_data = "Cartesian Minkowski"

ADMBase::initial_lapse = "one"

ADMBase::initial_shift = "zero"

ADMBase::initial_dtlapse = "zero"

ADMBase::initial_dtshift = "zero"

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

# Analysis

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

ActiveThorns = "ADMMass StaticConformal SpaceMask ADMMacros"

ADMMass::ADMMass_surface_distance[0] = 12

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

# IO

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

ActiveThorns = "IOUtil CarpetIOBasic CarpetReduce CarpetIOASCII CarpetIOHDF5 CarpetIOScalar"

IO::out_dir = $parfile

IO::out_every = 1

IOBasic::outInfo_vars = "ADMMass::ADMMass_box"

------------------------ Warning --------------------

WARNING[L1,P0] (CarpetIOBasic): Cannot output variable "ADMMASS::ADMMass_box_x_max" because it has no storage

I also want to know the difference between output-0000 and output-0000-active in simulation directory.

Thanks,

Yu Liu

---------------------------

Yu Liu

PhD Student

School of Physics

Huazhong University of Science and Technology