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Thanks indeed. Running with administrator rights does the job perfectly!

Odd quirk though, isn't it - when it instals it, it doesn't ask to modify the registry, only on removal. The user I am looged on to Vista with has admin rights though, so odd that it needs to be told to use them. Maybe I should go to Win7!!

Doesn't really matter though, now I know how to do it.

Again, many thanks.

Chris

OK, let me cover just what I did.

The maps in question were downloaded from http://mapas.vela-turcott.org/topo.php from which I selected a cell as an .img file. I don;t know what compiler was used to create it.

It did not have a self installer, so no installing has been done twice.

I then simply used MapsetToolkit to instal it in Basecamp, and it does show up and work, though obviously it is just the topo map, no details. This was a test, as what I eventually want to do is to download a number of "quadrants" and join them together and then use them as overlays on another less detailed Mexico map.

The only way I know they are not removed is that they are stil in Basecamp (and obviously still show in the MapsetToolkit window as well.

I have checked my installed progams list (Add/Remove Programs) and though some other gps maps show up (used with an installer, maps from gpsfiledepot), the two maps in particular I want to remove are not listed.

I am on MapsetToolkit V1.77 Beta, and use a laptop running Vista, with plenty of ram and disk, and all up to date.

Thanks for your ideas to date, and if I don't see any other thoughts, I'll email Cypherman1.

I did have Basecamp open when I first tried it, but I have tried again after closing Basecamp, and still get the message "Cannot remove a mapset".

I have tried the Uninstall in MapsetToolkit both with "Install in Basecamp" ticket and unticked, and this makes no difference.

I'm loath just to go and delete files as they are logged in the registry.

Any more ideas very welcome.

I am new to all this, so it is probably easy and something I am doing wrong....

but....

I downloaded a .img map file, and used MapsetToolkit and cgsmapper to install it into my Basecamp system.

The map is shown in the list of installed maps in the window on MapsetToolkit.

I now want to uninstal it, and when I click the uninstal button, having highlighted the map I no longer want, I am asked if I want to uninstal a map, I say yes, and I get the message saying that the map cannot be removed. I have admin priveleges, so it shouldn't be an authority issue.

Can anyone suggest why this function isn't working - am I doing it right?