Hi Niall,

I have no proper answer. Could be a rounding error. You could test by 
playing around with

Q.OUTPUT_FILE_FORMAT
Q.INPUT_FILE_FORMAT

Make sure that both are double or binary.

Stefan, any comment? How strict is this check?

Bye,

Patrick

On 07/28/15 12:17, Niall Ryan wrote:
>
> Hello,
>
> I am trying to use a lookup table for a an inversion setup and am
> having some errors that I don't really understand.
>
> The error that I receive is below and related to the abs_lookupAdapt method.
> It cannot find a frequency in the lookup table frequency grid. The
> first frequency value in the lookup table is "230100961900", and the
> error states that it cannot find frequency "2.30101e+11Hz". I thought
> it might be some sort of rounding error but I don't know.
>
> I am using the same Q structure for creating the tables and performing
> the inversion.
> Any help is appreciated.
>
> Best regards,
> Niall Ryan
>
>
> Run-time error in controlfile:
> /private/tmp/atmlab-niall-tp1e945327_f67b_4dab_a240_f8d486be3cc9/cfile.arts
> Run-time error in method: abs_lookupAdapt
> Cannot find new frequency 0 (2.30101e+11Hz) in the lookup table
> frequency grid.
> Stopping ARTS execution.
> Goodbye.
>
> Error using arts (line 67)
> An error occured while executing ARTS. See above.
>
> Error in arts_oem_init>init_local (line 411)
>     arts( cfile );
>
> Error in arts_oem_init (line 161)
> [Q,R,t_field,z_field,vmr_field,wind_u,wind_v,wind_w]
> = init_local( Q, R );
>
> Error in qpack2 (line 97)
>       [Qm,O,R,xa] = arts_oem_init( Qm, O, workfolder
>       );
>
> Error in invert_structures_from_listnew (line 261)
>               L2rel = qpack2(Q,O,Y);
>
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