So it's look like something is odd bout your Nuvi40? That's interesting that the ...1m.gpi works on Nuvi40.
Edit: Ohhhhhh I know why!!! I bet your Nuvi40 couldn't handle alert circle. 1s.gpi uses alert circle (hence the 's' for single alert) while 1m.gpi use no alert circle and multiple alerts (hence the 'm' for multiple alerts)
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