Hi, I have a problem generating gmapsupp.img. I can reproduce this with some simple steps. The file is generated but it doesn't work on GPS units. This happens with multiple versions of mkgap. I'm sure I am doing something wrong, but I don't know what. 1. Download and unpack the set of Computer Teddy Germany img files from: http://openstreetmap.teddynetz.de/latest/deutschland.tgz 2. Download and build latest svn HEAD of mkgmap or get latest version from: http://www.mkgmap.org.uk/snapshots/mkgmap-latest.tar.gz $ java -Xmx512M -jar ../../mkgmap/mkgmap.jar --version 735-svn Note: this is actually the latest svn HEAD version as of December 3rd - not sure the reported version number is correct. Note that this problem occurs in older versions as well (744 and 587 for example). 3. Save the attached mkgmap.opt, which lists all the Germany tiles. 4. Run mkgmap with something like: $ java -Xmx512M -jar ../../mkgmap/mkgmap.jar -c ./mkgmap.opt No errors, no output, gmapsupp.img is generated: $ ls -l total 238236 -rw-rw-r-- 1 andy webdevelopers 104960 2008-12-04 10:55 63240000.img -rw-rw-r-- 1 andy webdevelopers 13233 2008-12-04 10:55 63240000.tdb -rw-rw-r-- 1 andy webdevelopers 243656718 2008-12-04 10:56 gmapsupp.img -rw-rw-r-- 1 andy webdevelopers 5497 2008-12-04 10:54 mkgmap.opt drwxrwsr-x 2 andy webdevelopers 4096 2008-12-03 22:49 tiles 5. Copy gmapsupp.img to a GPS unit. The map is not used. This is confirmed on a 60CSx and Colorado. Any ideas on how to solve this? thanks, Andy -- Andy PGP Key ID: 0xDC1B5864 gmapsupp input-file: tiles/63274519.img input-file: tiles/63274879.img input-file: tiles/63273799.img input-file: tiles/63275423.img input-file: tiles/63273264.img input-file: tiles/63273619.img input-file: tiles/63275428.img input-file: tiles/63274884.img input-file: tiles/63273623.img input-file: tiles/63273797.img input-file: tiles/63274163.img input-file: tiles/63273618.img input-file: tiles/63274346.img input-file: tiles/63274168.img input-file: tiles/63274886.img input-file: tiles/63273438.img input-file: tiles/63275247.img input-file: tiles/63275602.img input-file: tiles/63275067.img input-file: tiles/63275604.img input-file: tiles/63275065.img input-file: tiles/63275239.img input-file: tiles/63273086.img input-file: tiles/63275068.img input-file: tiles/63274341.img input-file: tiles/63273625.img input-file: tiles/63274701.img input-file: tiles/63274521.img input-file: tiles/63275782.img input-file: 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