I have a 1198 running 6.74 which is the latest update. Had the unit about 2 years.
Been having trouble with the unit locking up when marking a way point, it will just freeze, wait 10 minutes nothing, try the power button, nada. Restart unit and the first waypoint you mark it locks up.
I removed all waypoints, cleared tracks, formatted nav directory, and restored defaults.
Ran it fresh like this with no waypoints added. After marking 4 waypoints it started saying waypoint saved but didn't assign it a name and it didn't show up on the map. I restarted the unit and the same thing.

Any ideas what to try? I do have the current software, not sure if I can reload it over the same version or not?

Appreciate any input you can give me. I am probably overlooking something, but for the life of me can't think of what to try next.