The program needs an Ascii text file as input. It has two modes of output. The basic mode produces an HDS file where each column in the input file becomes a separate HDS array in the output file. The second mode obtainable by putting the command word "EVENT" on the command line produces a standard Asterix EVENT_DATASET where each column in the input file is written into a LIST in the output file. Each list contains a data array, units if known and the min and max values in the data array. This file can subsequently be converted into an Asterix binned datafile using EVBIN.