Version mkgmap-r3596 was committed by gerd on Fri, 15 May 2015 print a stack trace if a MapFailedException is produced in one of the combiners (index, overview map, nsis etc) This should help to overcome the confusion created by the hint "There is not enough room in a single garmin map for all the input data. The .osm file should be split into smaller pieces first." produced by the BufferedImgFileWriter.