"Get Directions" in offline mode: How?

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Hello.

I recently went through the steps of downloading the software and storing my own maps on my phone, but now I am confused as to how I can calculate a route, or even a line that specifies the best route/directions to take.

I have a Blackberry Curve 9300 3G, however, I do not have a data plan. I have stored maps of my local area on my SD card, but every time I command it to "Get Directions", it simply says "No Route Found".

I can see my GPS location just fine, and I can even zoom into my maps and see everything on it. The option to get directions doesnt work though. Any suggestions?

Also, I have WiFi at my home, but this problem still exists even when I am connected to the internet, so I'm not sure what the issue with finding routes is (unless this program cannot do that). You may PM me or reply here. Thanks.

Regards