Hi Carlos
The first 0x1b0000 bytes (1.68MiB) of your gmapsupp.img are zero! It should
start with something like:
00000000 00 00 00 00 00 00 00 00 01 00 01 7d 00 00 00 00 |...........}....|
00000010 44 53 4b 49 4d 47 00 02 04 00 10 00 00 01 00 00 |DSKIMG..........|
00000020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000030 00 00 00 00 00 00 00 00 00 e9 07 01 1c 0f 27 20 |..............' |
00000040 02 47 41 52 4d 49 4e 00 00 52 57 42 20 48 61 6e |.GARMIN..RWB Han|
You should check the expansion of your command, esp. all the $Vars and * to see
that the parameters are exactly as you expect and stray files are not getting
into the build.
Are you generating a mkgmap.log.#n? If not suggest you investigate this
(-Dlog.config=mkgmap_log.props option)
Regards
Ticker
On Fri, 2026-02-20 at 10:01 +0100, Carlos Dávila via mkgmap-dev wrote:
> Hi all
>
> I'm having problems with a gmapsupp.img file created with mkgmap. It's
> not recognized by GPS and GMapTool reports header is wrong. I have
> recreated it from scratch and it continues failing. I have not changed
> my tool chain for a long time, so I don't know what may be causing the
> problem.
>
> Map is created with the following command:
>
> java -Xmx27G -ea -jar mkgmap.jar --index --gmapsupp
> --family-name="OpenStreetMap $MAPA" --family-id=${GRUPO}1${FID}
> --country-name=$PAIS --country-abbr=${ABR} --area-name="$MAPA"
> --product-version=$VERSION --series-name="OSM-$MAPA"
> --road-name-config=roadNameConfig_suffixes.txt --route
> tmp/${GRUPO}1${FID}*.img tmp/${ABR}${GRUPO}1${FID}.txt
> --description="OpenStreetMap $MAPA" --no-tdbfile
>
> Another gmapsupp created from the same *.o5m input files but with a
> different style is correct, but many other maps created with the same
> style are also correct, so I don't think style may be the origin of the
> problem.
>
> Problem file can be downloaded from
> https://alternativaslibres.org/tmp/gmapsupp_Canada.zip
>
>
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