"Navigate to" in contacts problem

[ktasker]

I'm using TTN 5.1 on an Ipaq 6340 upgraded from TTN 3. When I use "Navigate to" in Contacts I get the following error message:
"No maps found, please install and activate an original TomTom Navigator 3 map first"
I've done a hard reset recently, but I assume there's something left behind on the memory card?

Kev

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