Delorme PN-60 Routing Error

For those of you who who have a Delorme PN-60 and utilize the turn by turn directions, you will eventually encounter this error "Recalculate Error An error occurred while recalculating the route. Try again?".  It took me a while to figure out the cause and eventually fix for this but here is how:

Problem:
My PN-60 with TOPO9 installed will no longer route to anything.  I believe I have the latest firmware installed and it seemed to work fine until I took a different way one day that caused it to reroute a bunch of times.  Since then it has been completely useless in trying to route anywhere.  It has also started rebooting VERY frequently.

Solution:
Go to routes, then hit enter on each route.
From there click on menu then delete route.
Do this for all routes and presto - everything works perfectly.




Here is the official Delorme response to my query though I never tried this fearing it might delete more than it needed to.

***WARNING! This reset will delete the active track and all routes on the device! Back up any of this data you are interested in saving!***

1. Turn the Earthmate PN-Series GPS off.
2. Hold down the PAGE, MENU and Power buttons.
   
3. Once you see the dark blue Warning screen, release the Power button first, and then release the PAGE and MENU buttons.
4. Press ENTER
5. Scroll to Media and press ENTER.
6. Scroll to Internal 1(user data) and press ENTER.
7. Scroll to Format and press ENTER.
8. Scroll to Yes and press ENTER.
9. When ‘Operation successfully completed.’ appears on your screen, press ENTER.
10. Press the QUIT button twice. 
11. Scroll to Reboot and press ENTER.

Once the reboot completes create a sample route in your device to see if the device displays any errors.