[yt-users] Error in reading the hydrodynamics dataset in Ramses

[k.grisdale at surrey.ac.uk]

Hi Junhwan

I think the problem you might the having is you need to specify the fields you read into yt. To do this just modify you load command to this:

ds = load("/lustre/widow2/proj/ast031/test11_rhd_fesc=0.05/output_00048/info_00048.txt”, fields = ["Density","x-velocity", "y-velocity", "z-velocity", "Pressure”])

(Assuming that you are running a 3d Simulation with NVAR set as 5)

Hope that helps

Kearn


On 20 Nov 2013, at 16:26, Junhwan Choi (최준환) <choi.junhwan at gmail.com> wrote:

> Hi yt users,
> 
> I try to make a basic visualization for the Ramses simulation using
> following script:
> ==========================
> from yt.mods import *
> 
> ds = load("/lustre/widow2/proj/ast031/test11_rhd_fesc=0.05/output_00048/info_00048.txt")
> center = [0.5, 0.5, 0.5]
> 
> pw = ProjectionPlot(ds, "x", ("deposit", "all_density"))
> pw.zoom(1.01)
> pw.save("allview")
> 
> pw = ProjectionPlot(ds, "x", "Density")
> pw.zoom(1.01)
> pw.save("allviewGas")
> ============================
> It WORKS for the particle projection (for allview) but it does not
> work for gas projection.
> 
> When the yt try to deal with gas dataset, I got the following error
> message and the script crash.
> You are running with the wrong number of fields.
> Please specify these in the load command.
> We are looking for 6 fields.
> The last set of field sizes was: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
> 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
> 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
> Traceback (most recent call last):
>  File "DenVis_DM_Gas.py", line 10, in <module>
>    pw = ProjectionPlot(ds, "x", ("gas", "Density"))
>  File "/autofs/na3_home1/jhchoi/common/src/yt-hg/yt/visualization/plot_window.py",
> line 1441, in __init__
>    field_parameters = field_parameters)
>  File "/autofs/na3_home1/jhchoi/common/src/yt-hg/yt/data_objects/construction_data_containers.py",
> line 234, in __init__
>    self.get_data(field)
>  File "/autofs/na3_home1/jhchoi/common/src/yt-hg/yt/data_objects/construction_data_containers.py",
> line 278, in get_data
>    chunk_fields, "io")):
>  File "/autofs/na3_home1/jhchoi/common/src/yt-hg/yt/utilities/parallel_tools/parallel_analysis_interface.py",
> line 434, in parallel_objects
>    for obj_id, obj in oiter:
>  File "/autofs/na3_home1/jhchoi/common/src/yt-hg/yt/data_objects/data_containers.py",
> line 453, in chunks
>    self.get_data(fields)
>  File "/autofs/na3_home1/jhchoi/common/src/yt-hg/yt/data_objects/data_containers.py",
> line 531, in get_data
>    fluids, self, self._current_chunk)
>  File "/autofs/na3_home1/jhchoi/common/src/yt-hg/yt/geometry/geometry_handler.py",
> line 520, in _read_fluid_fields
>    chunk_size)
>  File "/autofs/na3_home1/jhchoi/common/src/yt-hg/yt/frontends/ramses/io.py",
> line 41, in _read_fluid_selection
>    rv = subset.fill(content, fields, selector)
>  File "/autofs/na3_home1/jhchoi/common/src/yt-hg/yt/frontends/ramses/data_structures.py",
> line 304, in fill
>    for level, offset in enumerate(self.domain.hydro_offset):
>  File "/autofs/na3_home1/jhchoi/common/src/yt-hg/yt/frontends/ramses/data_structures.py",
> line 102, in hydro_offset
>    hvals = fpu.read_attrs(f, header, "=")
>  File "/autofs/na3_home1/jhchoi/common/src/yt-hg/yt/utilities/fortran_utils.py",
> line 74, in read_attrs
>    assert(s1 == s2)
> AssertionError
> 
> I do not understand what is the problem since it is such a basic visualization.
> Since I am new for Ramses data, I may take a simple mistake.
> Can anyone explain what the error message means and how to resolve the problem?
> 
> Thank you in advance,
> Junhwan
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