Version mkgmap-r4336 was committed by gerd on Sat, 02 Nov 2019 mapid-too-high.patch: stop immediatly if (calculated) mapid is too high. For now this means > 99999999. The mapid is either extracted from the file name or given with option --mapname or calculated by incrementing the mapid of the previously given input file. http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4336