After running simulation using FLUKA (example from official website - https://flukafiles.web.cern.ch/manual/chapters/beginners_guide/building_a_fluka_input/the_sample_input_file.html) there were generated 5 binary files. After trying to convert those to json, 1 of them (_fort.47) gives an error. It might be connected to logarithmic BinningType.
How converting looked like:

Error received:

Fort.47 file inspect:
