Data is Empty

[acr604]

Bug report

Bug summary

I used to get the results before. But now in the same system and environment I am not getting any identified eddies for the same input file which I used earlier. Nothing changed or updated

Code for reproduction

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Actual outcome

DEBUG 2024-03-16 21:42:46,473   observation.    to_netcdf :
        Create Dimensions "obs" : 0
    DEBUG 2024-03-16 21:42:46,474   observation.    to_netcdf :
        Create Variable amplitude
WARNING 2024-03-16 21:42:46,474 observation.create_variable :
    Data is empty
    DEBUG 2024-03-16 21:42:46,474   observation.    to_netcdf :
        Create Variable effective_area
WARNING 2024-03-16 21:42:46,474 observation.create_variable :
    Data is empty
    DEBUG 2024-03-16 21:42:46,474   observation.    to_netcdf :
        Create Variable effective_contour_height
WARNING 2024-03-16 21:42:46,475 observation.create_variable :
    Data is empty
    DEBUG 2024-03-16 21:42:46,475   observation.    to_netcdf :
        Create Variable effective_contour_latitude
WARNING 2024-03-16 21:42:46,475 observation.create_variable :
    Data is empty

Expected outcome