Hello, Today, running splitter against the french osm.bz2 geofabrik file, I got this error : A total of 69 836 298 nodes, 8 242 531 ways and 178 671 relations were processed in 1 file Min node ID = 122626 Max node ID = 861772452 Time: Tue Aug 17 11:58:06 CEST 2010 Exact map coverage is (41.299989223480225,-6.299993991851807) to (51.42998456954956,9.799997806549072) Trimmed and rounded map coverage is (41.30859375,-5.80078125) to (51.416015625,9.84375) Splitting nodes into areas containing a maximum of 1 000 000 nodes each... Exception in thread "main" java.lang.NullPointerException at uk.me.parabola.splitter.SplittableDensityArea.split(SplittableDensityArea.java:73) at uk.me.parabola.splitter.SplittableDensityArea.split(SplittableDensityArea.java:90) at uk.me.parabola.splitter.SplittableDensityArea.split(SplittableDensityArea.java:90) at uk.me.parabola.splitter.SplittableDensityArea.split(SplittableDensityArea.java:90) at uk.me.parabola.splitter.SplittableDensityArea.split(SplittableDensityArea.java:90) at uk.me.parabola.splitter.SplittableDensityArea.split(SplittableDensityArea.java:90) at uk.me.parabola.splitter.SplittableDensityArea.split(SplittableDensityArea.java:90) at uk.me.parabola.splitter.Main.calculateAreas(Main.java:346) at uk.me.parabola.splitter.Main.split(Main.java:207) at uk.me.parabola.splitter.Main.start(Main.java:121) at uk.me.parabola.splitter.Main.main(Main.java:110) I use the latest code and I have max areas to 30 and max nodes to 1000000. I tried with max nodes = 800000 but I got the same error. Francois --