Hi Andzrej, I fear I still don't understand what to do to reproduce the problem. Can you please post more details? Gerd ________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Andrzej Popowski <popej@poczta.onet.pl> Gesendet: Dienstag, 28. Juni 2016 15:49:14 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] Error in mkgmap r-3676, wrong preview generation Hi Steve, just have tripped on similar problem. I have made a transparent map with layers 24-23 and preview map in layer 18. This went wrong, since tile's areas in preview (objects 4A) were split into parts. Mapsource and MapInstall expect single area for each object 4A. I guess mkgmap takes background object 4B from img and convert it to tile's area 4A. Background can be split, probably mkgamp should merge all instances of background into single object 4A. Simplified solution could be to use map extent form TRE header instead but this won't work for irregular background. -- Best regards, Andrzej _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev