Can I have a Map of Maps?

FrankR said:

I have been able to Load a Map of Maps, and Save it to a file.
I can see it in the file.
When I read the file back and try to access the map of a map with something like

MeterDetailsMap = MeterListMap.Get("ParticularKey")

I get a

java.lang.ClassCastException: java.lang.String

Really stuck.

Click to expand...

 [From Erels post]WriteMap will convert the inner maps to strings. 
Then when you load the file it will be a map of strings.