...and now for the interesting part: Declaring the offending method synchronized, e.g.
public *synchronized* int compareTo(RoadDef other) { ... } solved the problem for me. I don't think this is a general solution, cause the main problem probably lies a lot deeper... :? Best regards, Uli -- View this message in context: http://gis.19327.n5.nabble.com/NPE-with-mkgmap-3320-tp5813472p5813477.html Sent from the Mkgmap Development mailing list archive at Nabble.com. _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev