I have Junction View working on my Garmin with City Navigator 2013.1

However I also have streetmaps installed Sub-Saharan Africa Streetmaps 2012.1

When I combine the two JCV stops working. Is there any way to rectify this? Perhaps others have tried combo maps with a possible solution?

The thing is, City Navigator's JCV is great, but the map detail is poor. Streetmaps have much more detail and info on their maps...