ReadSplitARTSCAT ValueError: Type <class 'NoneType'> currently not supported.

I am trying to run the exercise in arts-lectures repository. I am getting the same error for all the scripts there with the function ws.ReadSplitARTSCAT.

ValueError: Type <class 'NoneType'> currently not supported. occuring at line

# Line catalogue: Perrin or HITRAN
ws.ReadSplitARTSCAT(
    abs_species=ws.abs_species,
    basename="hitran/hitran_split_artscat5/",
    fmin=0.9 * fmin,
    fmax=1.1 * fmax,
    globalquantumnumbers="",
    localquantumnumbers="",
    ignore_missing=0,
)

I did not find any folder in both installation and data directories with the name hitran_split_artscat5, so I trid using other directories in the arts-xml-data folder by changing the basename to spectroscopy/Hitran/, spectroscopy/Perrin/, spectroscopy/cat/ and spectroscopy/Perrin_newformat_speciessplit/ but still getting the same error.

lines in .bashrc for arts

export PATH="/home/ram/installs/arts-2.4.0/build/src/:$PATH"
export ARTS_BUILD_PATH="/home/ram/installs/arts-2.4.0/build/"
export ARTS_DATA_PATH="/home/ram/installs/arts-xml-data-2.4.0/"
export ARTS_INCLUDE_PATH="/home/ram/installs/arts-2.4.0/controlfiles/"

So the issue is with my arts installation, or arts-xml-data or codes in arts-lectures ? You can check the complete error message below.

Thank you in advance.

Error output for ipython absorption.py :


- jacobianOff
- Copy
- abs_speciesSet
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-3-2621b86668a0> in <module>
    129
    130 if __name__ == "__main__":
--> 131     main()

<ipython-input-3-2621b86668a0> in main()
     16
     17     # Call ARTS to calculate absorption cross sections
---> 18     freq, abs_xsec = calculate_absxsec(species, pressure, temperature)
     19
     20     # Plot the results.

<ipython-input-3-2621b86668a0> in calculate_absxsec(species, pressure, temperature, fmin, fmax, fnum, lineshape, normalization, verbosity)
     85
     86     # Line catalogue: Perrin or HITRAN
---> 87     ws.ReadSplitARTSCAT(
     88         abs_species=ws.abs_species,
     89         basename="hitran/hitran_split_artscat5/",

~/anaconda3/lib/python3.8/site-packages/typhon/arts/workspace/workspace.py in __call__(self, *args, **kwargs)
    260
    261     def __call__(self, *args, **kwargs):
--> 262         self.m.call(self.ws, *args, **kwargs)
    263
    264     def __repr__(self):

~/anaconda3/lib/python3.8/site-packages/typhon/arts/workspace/methods.py in call(*args, **kwargs)
    358         ws   = args[1]
    359
--> 360         (m_id, arts_args_out, arts_args_in, temps) = self._parse_output_input_lists(ws,
    361                                                                                     args[2:],
    362                                                                                     kwargs)

~/anaconda3/lib/python3.8/site-packages/typhon/arts/workspace/methods.py in _parse_output_input_lists(self, ws, args, kwargs)
    236         g_out_types = dict([(k,WorkspaceVariable.get_group_id(g_output_args[k]))
    237                             for k in self.g_out])
--> 238         g_in_types  = dict([(k,WorkspaceVariable.get_group_id(g_input_args[k]))
    239                             for k in self.g_in])
    240         m_id = self.m_ids[0]

~/anaconda3/lib/python3.8/site-packages/typhon/arts/workspace/methods.py in <listcomp>(.0)
    236         g_out_types = dict([(k,WorkspaceVariable.get_group_id(g_output_args[k]))
    237                             for k in self.g_out])
--> 238         g_in_types  = dict([(k,WorkspaceVariable.get_group_id(g_input_args[k]))
    239                             for k in self.g_in])
    240         m_id = self.m_ids[0]

~/anaconda3/lib/python3.8/site-packages/typhon/arts/workspace/variables.py in get_group_id(value)
    189             return group_ids[type(value).__name__]
    190         else:
--> 191             raise ValueError(f"Type {type(value)} currently not supported.")
    192
    193     @classmethod

ValueError: Type <class 'NoneType'> currently not supported.

System info

OS: Ubuntu 20.04 LTS , GCC version 9.3
arts version 2.4

atmtools / arts

ReadSplitARTSCAT ValueError: Type <class 'NoneType'> currently not supported. #317