Sorry for my brief response. I am on JellyBean 4.1.2. I have followed tutorial. Installed apk, changed permisions to files.
I am from Argentina. I have just tested it on the car and noticed that I have to wait until GPS signal bar is full green. If I try to searcbefore that program terminates.
Once signal barisfull it works fine. But if you have to recalculate trip program exits abruptally ( or if you press yellow button to recalcute alternate journey)

Hope this answer is more descriptive