Hi, the help file says merge-lines < ... > At the moment this option causes routing errors. Use only if routing is not needed in your map. Maybe I found the reason for the routing errors: If the segments of a road are merged, it might happen that the LineSplitterFilter has to split it because it has more than 250 points. The current implementation of LineSplitterFilter does this: The first part of a road is added as a road, all remaining parts are added as lines. With a simple change all parts are added as roads: Index: LineSplitterFilter.java =================================================================== --- LineSplitterFilter.java (revision 2581) +++ LineSplitterFilter.java (working copy) @@ -84,7 +84,7 @@ log.debug("saving next part"); l.setPoints(coords); next.doFilter(l); - l = new MapLine(line); + l = line.copy(); count = 0; first = false; The interesting part for me is that the following routines seem to expect exactly this, but parts of the code was never executed. See also http://gis.19327.n5.nabble.com/PATCH-v1-highwayCount-tp5748554p5748864.html I also wonder if it really makes sense to limit the check "Non-routable way with routable type ..." to resolution 24. I'll try to find out more tomorrow. Gerd -- View this message in context: http://gis.19327.n5.nabble.com/merge-lines-and-routing-tp5758913.html Sent from the Mkgmap Development mailing list archive at Nabble.com.