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I tried to split the file into grib1 and grib2 fields. The grib1 file looks fine and can be processed by cdo, but the grib2 file has the gridType gridSize changed (maybe?) which seems to prevent further post processing:
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I tried to convert the mixed files that still contains the correct gridType with grib_to_netcdf but here too I get an error related to the gridType:
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