Hi Mathias,

A couple of ideas:

1. Since the frequency value in the error output has only 5 digits after the 
decimal[1], it might well be that your extension by 700 kHz is not sufficient 
and still leads to the same error message due to rounding. I'd propose to 
extend f_grid by 2 MHz and see if that fixes the problem.

2. You probably did this but to be sure I'll ask anyway: Did you recalculate 
the lookup table after extending the f_grid?

Cheers,
Oliver

[1] we'll apply a fix to improve that output


> On 30. Jun 2023, at 09:00, Mathias Milz <mathias.m...@ltu.se> wrote:
> 
> Dear all,
>  Maybe someone here can help me:
> 
> I set up a new retrieval for high resolving spectrometer using pyARTS with 
> OEM. Since it covers a wider range of the spectrum with higher resolution, 
> I've expanded the f_grid accordingly (with relatively high resolution, lower 
> than the spectrum).
>  pyARTS calculates the LookUp Table as it should.
>  If the run then goes into ws.OEM, then it stops  with the error message 
> below.
> I extended the spectrum by 700kHz and the error occurs again.
>  According to the error message, it happens in yCalc.
>  What makes me suspisious: The pure forward calculation withy Calc (i.e. 
> without OEM call) with the LUT read in runs perfectly.
>  Does anyone here have an idea what the problem could be?
>  Thanks in advance
>  Mathias
>   And here the error message:
> Run-time error in method: yCalc
> User Error: failed
> Error is found at:
>                 
> /usr/local/miniconda/envs/pyarts-build/conda-bld/pyarts_1675241025317/work/src/m_rte.cc:2774
> Please follow these instructions to correct your error:
> User Error: failed
> Error is found at:
>                 
> /usr/local/miniconda/envs/pyarts-build/conda-bld/pyarts_1675241025317/work/src/rte.cc:1750
> Please follow these instructions to correct your error:
> Run-time error in function: iyb_calc
> Run-time error in agenda: iy_main_agenda
> Run-time error in method: iyClearsky
> User Error: do_abort
> Error is found at:
>                 
> /usr/local/miniconda/envs/pyarts-build/conda-bld/pyarts_1675241025317/work/src/m_rte.cc:656
> Please follow these instructions to correct your error:
> Error messages from failed cases:
> Runtime-error in source calculation at index 122: 
> Run-time error in agenda: propmat_clearsky_agenda
> Run-time error in method: propmat_clearskyAddFromLookup
> Problem with gas absorption lookup table.
> At least one frequency is outside the range covered by the lookup table.
> Your new frequency value is 2.32501e+11 Hz.
> The allowed range is 2.295e+11 to 2.32501e+11 Hz. Runtime-error in source 
> calculation at index 162: 
> Run-time error in agenda: propmat_clearsky_agenda
> Run-time error in method: propmat_clearskyAddFromLookup
> Problem with gas absorption lookup table.




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