Too many custom maps?

[N7XW]

I am new to TF and am having an issue with maps on my Oregon 450.  I am using the Pro version.  I can download .kmz maps and load them to the micro sd card in the gps.  When I turn it on though, I get the message "Too many custom maps, not all maps will load" or something very similar (don't have the gps with me right now).  The gps will indeed display some of the map data but no where close to all of it.

I downloaded and transferred two MyTopo maps, each below the 100 tile limit.  What am I doing wrong?  Does the 100 tile limit apply to all maps downloaded or each file individually?  If it applies to all, I'm not going to be able to cover hardly any area at all.

Thanks.

Jon

[ScottMorris]

Hi Jon,

>
> I don't seem to be getting notifications on the forum (of new posts) so I
> keep missing them.
>
> To answer your questions - the tile limitation is across all files,
> unfortunately. And yes, the area you can cover with 100 tiles is not very
> big.
>
> The Montana unit can go to 500 files, but it's kinda big.
>
> I have been working on a way to emulate the Garmin format, thus getting
> around the tile format, but it probably won't be ready for a while yet (if
> it ends up working 100%).
>
> Thanks for the note and the interest,
>
> Scott