Hi all, in a private mail I was informed that mkgmap crashes when polish input contains no label for types which are considered as contour line data like this [POLYLINE] Type=0x20 Data0=(51.5300781,-0.0988259), (51.5305501,-0.0989852), (51.5311576,-0.0992174) [END] The same data was handled without problem before r4907. As a quick hack I've added a null check to restore the old behaviour, but I wonder if it would be better to stop with an error message or maybe ignore contour line data when no elevation is given in the label? I guess the same problem can happen with OSM data when a style uses the line types 0x20 .. 0x25 . Should I add checks to warn when these line types are used without a proper label that can be elevation data? Gerd