Hi Minko, I've installed mingw-w64. Click on Download here https://sourceforge.net/projects/mingw-w64/ to get a mingw-w64-install.exe I think I've executed that program with defaults. After that you should find a script mingw-w64.bat in a path similar to this: "c:\Program Files\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw-w64.bat" Execute it and use something like cd c:\temp wget.exe -O - http://m.m.i24.cc/osmconvert.c | gcc -x c - -lz -O3 -o osmconvert to create a suitable osmconvert.exe in c:\temp Note that you have to use gcc instead of cc, besides that the command is the same as on the wiki page. Maybe add a path to wget. Same steps for osmfilter and osmupdate. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von lig fietser <ligfietser@hotmail.com> Gesendet: Donnerstag, 20. Dezember 2018 14:22 An: mkgmap-dev Betreff: Re: [mkgmap-dev] data missing in extracts Hi Gerd, I am using the osmconvert 32 bit version on a Windows 7/64 bits pc. How do I build another version with large file support? ________________________________ Van: Gerd Petermann <gpetermann_muenchen@hotmail.com> Verzonden: donderdag 20 december 2018 05:08 Aan: lig fietser; Development list for mkgmap Onderwerp: AW: [mkgmap-dev] data missing in extracts Hi Minko, some weeks ago I found out that I had an osmconvert build for Windows 64 without large file support and that caused strange errors like empty files. Make sure not to use these versions / to build your version with large file support. See https://wiki.openstreetmap.org/wiki/Osmconvert#Windows for details. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von lig fietser <ligfietser@hotmail.com> Gesendet: Donnerstag, 20. Dezember 2018 13:14 An: mkgmap-dev Betreff: [mkgmap-dev] data missing in extracts Hi, Recently I have a lot of issues updating my OSM data. Normally my workflow is updating a region (Benelux) with osmupdate. Recently I have found out the updates are corrupt, all mp relations are not in the map anymore. Today I tried to download a Europe extract from Geofabrik, I cut out the Benelux area with osmconvert and again: no relations in the map at all. Anyone having the same issue? I have no idea how to solve this, I have the latest versions of wget, osmupdate and osmconvert. Don't think it is a step in my splitter/mkgmap chain because the source (o5m) is smaller than the previous versions which contains all relations. Sometimes it works, but often not and today I found out that even the Europe extract was corrupt. </ligfietser@hotmail.com></mkgmap-dev-bounces@lists.mkgmap.org.uk>