Hi Peter, dev, For the OSM history splitter[1], does the file extension in the first column of the config file determine the out file format? Martijn [1] https://github.com/MaZderMind/osm-history-splitter -- martijn van exel geospatial omnivore 1109 1st ave #2 salt lake city, ut 84103 801-550-5815 http://oegeo.wordpress.com