I downloaded a central america map and when I try to unzip or open I get Error: Internal error processing iso image. Does anyone know how to fix? Thank you.

asked 25 Apr '11, 20:34

tdfam2's gravatar image

accept rate: 0%

edited 11 Feb '13, 00:35

aseerel4c26's gravatar image

aseerel4c26 ♦


Where did you download the map from, and what exactly was the download link? OSM doesn't make ISO images available, so either you downloaded the file from somewhere else (and would have to ask them why the file is broken), or maybe your system thinks that the file is an ISO image when in fact it isn't. What operating system do you have, and how do you try to "unzip or open"?

(25 Apr '11, 20:41) Frederik Ramm ♦

I downloaded from osmmaps.com. I have windows xp and when I try to open with win zip I get the error mesage. I attached my garmin nuvi 200 to my computer and drag and dropped the file into a folder on my garmin's sd card but still not getting maps.

(26 Apr '11, 11:43) tdfam2

I've just downloaded the Central America map from there, copied it to a "Garmin" folder on the micro-sd card on my Nuvi 265w, searched for "Belize" (via Where To / Cities / Spell) and got a map of Belize City. The mapping's a bit incomplete, but that's because the data isn't in OSM yet.

(26 Apr '11, 14:48) SomeoneElse ♦


It sounds like you are trying to double-click, or otherwise open, an .img file intended for a Garmin GPS.

You shouldn't do this. Double-clicking tells your computer to "find the program that will understand .img files, and open this with it". But this .img file is not meant for a program on your computer. It's meant for your Garmin GPS unit. Assuming you have an SD card installed in the card socket for your Garmin, simply do this:

  1. Connect your Garmin to your computer via a USB cable.
  2. Put your Garmin in USB Mass Storage mode. (On an eTrex, this is typically done by going to the menu screen, then Setup -> Interface -> USB Mass Storage.)
  3. The Garmin should show up as a removable disc (like a USB stick) in the usual place. On a Mac, for example, this will be on the desktop.
  4. If there isn't a folder on the Garmin called 'Garmin', create one.
  5. Into this folder, copy the .img file that you downloaded.
  6. Rename it to gmapsupp.img if it's not already called that.
  7. Eject the Garmin as you would a USB stick. Again, on a Mac, you do this by dragging it to the trash.

When your Garmin reboots, you should now have the OSM map displayed.

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answered 25 Apr '11, 21:14

Richard's gravatar image

Richard ♦
accept rate: 19%


I registered here just to say thank you Richard, you are awesome.

creating a folder named Garmin into the SD/memory was the solution. then inside it i copied the downloaded maps and it works fine. Thanks again

(28 Feb '13, 12:04) Xchesskiller

You can create a folder in your garmin device, name it "Map" then copy the "gmapsupp.img" file into it then it should auto load after.

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answered 06 Jun '13, 10:02

TheSword's gravatar image

accept rate: 0%


this exact method worked for my garmin nuvi 2797

thank you :)

(06 May, 09:30) zaimc

I registred to say thanks... this method worked for me too. nex to GARMIN folder, I created a MAP folder and than copied the image file. everything works just fine.

thnks a lot again. Gabriel

(20 May, 20:42) angel_gabe

2015-08-03 This method worked very easily on my Garmin Nuvi 3597LM. As a note, after creating the folder named "Map" and copying the "gmaspupp.img' file into that folder, I ejected the device & booted it. After the splash screen/boot screen, the device popped up a notification that I had an upgraded map. After a accepting, it took me to my map & it showed all the new content.

Thanks for posting this answer!!!

(03 Aug, 22:03) Tip DS

Unfortunately it doesn´t work for me.

What I have tried: 1. Creating the folder \Garmin on my SD card and copying the "gmapsupp.img" into the folder 2. Creating the folder \Map on my SD card and copying the "gmapsupp.img" into the folder 3. Creating the folder \Map on the Garmin storage (next to the "Garmin" folder) and copying the "gmapsupp.img" into the folder

In neither case I can find the new map on my device (nüvi 255W). Source of my file: http://mapas.alternativaslibres.es/downloads.php (Chile OSM Base map)

Any advice?


edit: now I managed to do it with mapsource. Very good manual: http://www.nzopengps.org/index.php?option=com_content&view=article&id=3&Itemid=4 Probably my nüvi had problems with my SD card.

Download mapsource: http://www8.garmin.com/support/download_details.jsp?id=209 If you have problems installing it, unzip the .exe and double click the MSmain.msi

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answered 16 Sep, 12:16

LNN's gravatar image

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edited 16 Sep, 12:58

Sometimes a different description of the procedure helps try this one. http://talkytoaster.co.uk/maps/how-to-install-the-map/

(16 Sep, 14:25) andy mackey

Seems to have worked for an install of UK and Ireland Maps on My Garmin Nuvi 3597. It did require creating a Map folder, and renaming the .img file

(Didn't work with Map folder in the Garmin folder so put it in general directory).

Thanks very much

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answered 23 Aug, 03:46

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question asked: 25 Apr '11, 20:34

question was seen: 155,689 times

last updated: 16 Sep, 14:25

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