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Split an input file (GRIB, BUFR etc) into chunks of roughly the same size. The output files are named input_01, input_02 etc. This is much faster than grib_copy/bufr_copy.
If the nchunks argument is -1, then the file is split into the individual messages.
USAGE
codes_split_file [-v] nchunks input
OPTIONS
-v
Print the count of messages and files created