NOTE: Presently this code uses a file with the suffix ".STEP" as a guide for listing the demag steps available when using the Locality Equal Area plot. This file is created when the locality is openned if not already present; if present it is not modified. If you use this code and have created a .STEP file, and have then updated the sample data with additional demag steps, you must use the "Remake .STEP" option before using the Locality Equal Area option or you will not be able to plot the new demag steps using the "Locality Equal Area" plot option. This doesn't affect the availability of new steps for any other plot.
NOTE: Although the .STEP file will reflect changes in order (i.e., it might have AF steps, then TT steps, then the same AF steps again if some samples were AF demagnitized before thermal treatment and some were AF demagnetized after thermal treatment), selecting a single demag step will result in ALL steps at the same demag level being selected, regardless of their position relative to other demag steps (e.g., for the AF/TT/AF example, selecting the second AF 50 would result in both AF 50's before TT and AF 50's after TT being selected). Multiple steps with the same demag id for the same sample (not a good practice) can only be selected by selecting the multiple steps in the dialog box.
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