ZUMO 550 Crazy Routing

I've got a Zumo 550 running version 4.70 of the software. Upgraded just before going on my last trip.

Zumo now routes crazily, when using 'shortest distance' will plot hundreds of miles out of the way!!!????
Before I check for upgrades, wondering if anyone else has encountered this. For instance, from around Cairo, IL, will plot a route to Superior, WI that goes FAR west in Iowa, north, than returns far east... about 250+ miles out of the way..

Plotting a similar route, with a waypoint to Madison WI, will plot straight north, then straight east to Madison, straight west back along the same route, and then north again.

example image shows a plot with a very obvious crazy jog in it...

It did not exhibit this ridiculousness previously, and I've not changed any settings, avoidances, etc.

Oh, and it randomly shuts off occasionally... No power warnings, just goes instantly black...

Anyone else seen this... Have a fix.... Haven't check for latest upgrade yet, wanted to check this forum..

Thanks,
Jan..

Jan
I sounds a bit like you have the option "avoid main roads" selected. It can do some funky routing then.

A tip in Mapsource. Pick you waypoints carefully - zoom right in. You could, for instance, select the south-bound lanes of a highway, when you're heading north. You will then take the "scenic" route. Before you select the point, right click and some other options pop up. Try not to merely select a town (it will take you to the middle of it) but rather the exit road. Take a close up look at route, especially near the waypoints - it can send you down a road, then tell you to do a U turn - and get itself "lost"

rmarkr said:

Jan
I sounds a bit like you have the option "avoid main roads" selected. It can do some funky routing then.

A tip in Mapsource. Pick you waypoints carefully - zoom right in. You could, for instance, select the south-bound lanes of a highway, when you're heading north.

Click to expand...

Excellent point by Mark - have fallen into that trap unawares - BTDT!!

Jan

I too have on numerous times been concerned about the shortest route. It sent me up a dead end the other day on a side road !
However I have played with it enough to start making my own routes. Word of advice about that, make a route to the half way point and then make another route to return. If not and you start out from the same point it will try to take you straight to the end and miss out all the fun in the middle. This could go on for miles.
I still struggle transferring my routes to the GPS, but I am working on that.
Still I do love appreciate it and it gets me home every time, even if it sends me a long way round

rmarkr said:

Jan
I sounds a bit like you have the option "avoid main roads" selected. It can do some funky routing then.

A tip in Mapsource. Pick you waypoints carefully - zoom right in. You could, for instance, select the south-bound lanes of a highway, when you're heading north. You will then take the "scenic" route. Before you select the point, right click and some other options pop up. Try not to merely select a town (it will take you to the middle of it) but rather the exit road. Take a close up look at route, especially near the waypoints - it can send you down a road, then tell you to do a U turn - and get itself "lost"

Click to expand...

Have not seen that option on a Zumo.. I do have an avoidance set for 'interstates' but that was no problem until now.. Not using mapsource, but aware that you need to be careful..
Thanks
Jan..

This is a great source of zumo advice http://www.zumoforums.com

Roger