1) Put the file «Reader.m» to the Mathematica folder «ExtraPackages» (if it necessary you should use search);
2) Create Mathematica file in a folder, where are situated oommf files that you try to scan;
2) Put next lines to your Mathematica file:
<< oommfUtilities`Reader`
getStage[file_String] := StringSplit[file, "-"][[-2]] // ToExpression;
files = Sort[FileNames["*.omf", NotebookDirectory[]]]
data = OVFReader[files[[1]], Normalized -> False, OutputFormat -> "automatic", LengthUnit -> "nm"];
3) After running this code you will get a magnetization distribution in a first file. If you want to get magnetization distribution from the other files just change the number in double square brackets in the last line.