Quote Originally Posted by Doc_Koordinate View Post
this procedure has been mentioned before at some places but was very hard to find for me.
Also some parameters have obviously changed with the current version of Webupdater 2.5.4
10601014hh
so I want to post it again.
With my GPSmap 278 I got it working like this after some struggling:
Preparations: have Mapsource and Webupdater installed and battery of the Garmin fully charged
1. use Mapsource (or Mapinstall) to create a gmapsupp.img file from the desired map to any SD card or USB stick (pay attention to maximum allowed file size for internal maps on your Garmin - for the 278 the limit seems to be ~1.75GB)
2. rename the gmapsupp.img to gmapprom.img and move it to a folder on your HD e.g. C:\newmap\
3. unlock this file if necessary
4. for cosmetical purposes use gmaptool to write a proper header to the file (e.g. 'CN Northamerica 2013.10')
5. check out the location of webupdater.exe (e.g. C:\Garmin\webupdater\webupdater.exe)
6. within the folder with the gmapprom.img create a text file with following content:
<path to webupdater.exe> /i /autorun usb /upload_file rgn=49 path=<path to gmapprom.img>
save the text file as sendmap.bat and close it
Example:
C:\Garmin\Webupdater\webupdater.exe /i /autorun usb /upload_file rgn=49 path=C:\newmap\gmapprom.img
7. power up your Garmin and connect it to the PC, when done doubleclick sendmap.bat to start the upload

*** for unknown reasons the upload (I experienced this with data cards as well) may break down in various stages ('Communication Error') - no problem: start again at 7. - sooner or later the upload will be succesfully finished. Nevertheless it's all your own risk *** good luck
First post...

Came across this forum as I'm trying to upload a gmapsupp.img file that I have onto my Garmin 376C

Found the above which I see is from a few years back but can anyone with knowledge on doing this confirm that these instructions are the same doing so with my 376C...?

I'm not overly tech savvy but can follow instructions well and tend to get things to work but I am having a heck of a time trying to do this

Thanks for any help...