Nuvi 255W Part 2
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1. Be nice to each other and respect the moderators. Post in normal font size, color and weight. Follow Nettiquette
2. NO out of topic. Discuss about GPS device only
3. NO abuse, profanity and insults
4. NO spamming, cross posting and opening of duplicate topics
5. NO advertisement post or link
6. NO post/link to warez, cracks, serials or illegally obtained copyrighted content
7. Each message posted is owned by and is the opinion of the original poster. Neither mfm nor its owner or moderators are legally responsible for anything posted on the forum
Re: Nuvi 255W Part 2
now i've install MSM and MFM, everytime i turn on the device it'll show 'can't unlock map' but both MFM and MSM are working fine, can anybody suggest me a way to fix this please? I got a .gdb file for CPOI, would like to noe how can i load it into my device?thx!
- silverbeauty
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- Joined: Tue Sep 16, 2008 6:29 pm
- Location: Sin-Ka-Pu-Ra Garmin Nüvi1350, 3790T, Fenix, eTrex HcX Panasonic ICE+Garmin Samsung Note3 Apple iPad3
Re: Nuvi 255W Part 2
jeremygoh wrote:now i've install MSM and MFM, everytime i turn on the device it'll show 'can't unlock map' but both MFM and MSM are working fine, can anybody suggest me a way to fix this please? I got a .gdb file for CPOI, would like to noe how can i load it into my device?thx!
If MSM / MFM maps appear in your GPS, the error has nothing to do with them.
You must have some other map files residing in your Nuvi.

- 9w2yon
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- Location: Kota Bharu, Kelantan, 255W
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Re: Nuvi 255W Part 2
jeremygoh wrote:I got a .gdb file for CPOI, would like to noe how can i load it into my device?thx!
to use the cPOI, the file must be in GPI format and load in POI folder... use POI Loader (can be downloaded from Garmin site) to convert GPX (not GDB) to GPI...
73.
Operating Garmin Nuvi 255W SG/MY version with:
- SW 2.80
- MFM-Garmin map
- SW 2.80
- MFM-Garmin map
Re: Nuvi 255W Part 2
exactly.....i guess there's an America map inside, not sure how to unlock it, but I dun planned to unlock it anyway, just wanna noe how to uninstall it. Can u suggest me a way?
- 9w2yon
- Contributor
- Posts: 236
- Joined: Thu Aug 13, 2009 1:57 pm
- Location: Kota Bharu, Kelantan, 255W
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Re: Nuvi 255W Part 2
silverbeauty wrote:jeremygoh wrote:now i've install MSM and MFM, everytime i turn on the device it'll show 'can't unlock map' but both MFM and MSM are working fine, can anybody suggest me a way to fix this please? I got a .gdb file for CPOI, would like to noe how can i load it into my device?thx!
If MSM / MFM maps appear in your GPS, the error has nothing to do with them.
You must have some other map files residing in your Nuvi.
try to use gmaptool to find what maps reside in your unit... there must be one locked map in your unit..
73.
Operating Garmin Nuvi 255W SG/MY version with:
- SW 2.80
- MFM-Garmin map
- SW 2.80
- MFM-Garmin map
- 9w2yon
- Contributor
- Posts: 236
- Joined: Thu Aug 13, 2009 1:57 pm
- Location: Kota Bharu, Kelantan, 255W
- Contact:
Re: Nuvi 255W Part 2
jeremygoh wrote:exactly.....i guess there's an America map inside, not sure how to unlock it, but I dun planned to unlock it anyway, just wanna noe how to uninstall it. Can u suggest me a way?
to remove, just delete the map from your unit...
Operating Garmin Nuvi 255W SG/MY version with:
- SW 2.80
- MFM-Garmin map
- SW 2.80
- MFM-Garmin map
Re: Nuvi 255W Part 2
9w2yon wrote:jeremygoh wrote:exactly.....i guess there's an America map inside, not sure how to unlock it, but I dun planned to unlock it anyway, just wanna noe how to uninstall it. Can u suggest me a way?
to remove, just delete the map from your unit...
thx for the suggestion, but how can i noe which is the right file to delete?
- 9w2yon
- Contributor
- Posts: 236
- Joined: Thu Aug 13, 2009 1:57 pm
- Location: Kota Bharu, Kelantan, 255W
- Contact:
Re: Nuvi 255W Part 2
jeremygoh wrote:9w2yon wrote:jeremygoh wrote:exactly.....i guess there's an America map inside, not sure how to unlock it, but I dun planned to unlock it anyway, just wanna noe how to uninstall it. Can u suggest me a way?
to remove, just delete the map from your unit...
thx for the suggestion, but how can i noe which is the right file to delete?
use gmaptool to get the info of the map... search in this forum, where to download & how to use gmaptool...
73.
Operating Garmin Nuvi 255W SG/MY version with:
- SW 2.80
- MFM-Garmin map
- SW 2.80
- MFM-Garmin map
- silverbeauty
- Moderator
- Posts: 3526
- Joined: Tue Sep 16, 2008 6:29 pm
- Location: Sin-Ka-Pu-Ra Garmin Nüvi1350, 3790T, Fenix, eTrex HcX Panasonic ICE+Garmin Samsung Note3 Apple iPad3
Re: Nuvi 255W Part 2
jeremygoh wrote:exactly.....i guess there's an America map inside, not sure how to unlock it, but I dun planned to unlock it anyway, just wanna noe how to uninstall it. Can u suggest me a way?
Hook up your Nuvi to your Lappy
BACKUP ALL files in your Nuvi including "HIDDEN" files
Use Win Explorer to explore the MainMemory/garmin directory.
I may be wrong, but USA map could be labeled as gmapprom.img with a file size close to 1G
Delete this file.
If you need assistance, do a screen shot of your Nuvi MainMemory/garmin directory and post here.
We can try to assist to guess which file is your USA map.
Re: Nuvi 255W Part 2
http://img16.imageshack.us/img16/1845/ss255w.png
Hi guys, here's the screen shot, plz help to identify the US map
i appreciate it
Hi guys, here's the screen shot, plz help to identify the US map

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