Error: "Route calculation error. Not enough memory available"

It was asked a year ago and the suggestion was to reset the watch and I really don't want to because of my dozen saved locations.  

How much space do I need?  I deleted a large app and a large watch face I don't really use and it didn't help.  

According to Garmin Express, I have 11 apps installed I have free space of 835KB.  How much space do I need and where can I find some more?  

I deleted stuff and got it up to 1.3 megs... no dice

Also... is it memory, as in RAM, or memory as in storage?