I cannot get a route to work on my Montana

Was billed as "manufacturing update". Might be that it was only released from the factory, not as an update for general consumption.

Yeah. You are correct. It was not released as far as I can tell either. I think that was the firmware revision that I was at but the 10.90 version is so far, working the way it use to work. I told Garmin about my results. They responded with "Thank you for the update"

So at least some good news.

I asked the question of the Garmin support people working on my ticket:

At least they know I'm not making this up so hopefully they will come up with a solution.

I got some good news from Garmin today.

Garmin tech support said: "I was informed today that there is a software update coming soon that will fix this issue. We are expecting mid August."

Hope this fixes the issue for good.

Hi All, I have a similar problem, I try to navigate however it does nothing, some times it just keeps on 0%, somehow it looks like the unit thinks it has a route in navigation, but this is not correct. What I did and worked twice was to, from the map page, move the screen to a side, then pinch in the screen to have a pin to appear, then press in the text that apears in the top to make the "Go" button to apear, pressing it makes the unit to display a dialog asking for add a new via point ot a destitantion, I select a destination and then it sarts a new navigation, then I just cancel it and start a new one as usual, then it works, at least the last tow times I had the issue it did, Hope it helps.

Do you know what your firmware version is?

Garmin has recently told me that the firmware update to fix this is now scheduled for mid October but that is a shaky date according to my correspondence with them.

Sure, it is 13.20.... I was a mess, I was on a trip and it worked fine the first half, just begin to fail at the return, somehow I correlated that I was not terminating the segment or using the "Stop navigation" option, then I found that using the point directly in the mep worked..

I can't see how it could be the unit as many of us are having same issue.

It either fails to route at 0% or stops at 80% of calculation.

When it does work it works for my saved waypoints, if I try to find point of interest etc, error returns.

Have reset many times, but error comes back eventually. 

I really hope Garmin can fix this. Used to work great.

I am in Australia with City Navigator for my region.

Cheers.

So I'll tell everyone again. I had this problem. I then reverted my firmware to 10.90 and the problem has not happened since I reverted. It was something in the firmware update. I can't swear reverting the firmware will work for you, but it worked for me. And it has continued to work everytime.