[Carpet] refinement in space only

[Yosef Zlochower]

Hi,

   I am trying to use carpet to refine in space only. I used
the parameters

  time::dtfac                             = 0.03125
Carpet::prolongation_order_space   = 5
Carpet::prolongation_order_time    = 0
Carpet::max_refinement_levels      = 5 #5
Carpet::time_refinement_factors = "[1,1,1,1,1]"
Carpet::num_integrator_substeps = 3
Carpet::use_outer_buffer_zones = "yes"
CarpetRegrid::refinement_levels    = 5 #5
CarpetRegrid::regrid_every         = 0
CarpetRegrid::refined_regions = "centre"

Is this correct? If not, what parameters should I set so that carpet
refines in space only. I evolved my code with these parameters and it
developed nans near the boundary of the finest level (both with and
without Kreiss Oliger dissipation). The reason why I
wanted to refine in space only, was to that I wanted to calculate psi4
and then decompose in l,m modes (and I wanted all these decompositions
to be on the same time level). However, I found that carpet replaces
all boundary and buffer points with zeros. What parameters should I
set so that Carpet will interpolate the data from the coarse grids
onto the finner grids for this type of analysis level gridfunction?

Thanks

Yosef