Learning, need help

[SDPhantom]

The error is telling you that you're trying to write to a table that doesn't exist. You need to create a table before you can store entries in it.

Originally Posted by _Max_Cavalera_ if not addonDB["chars"][realm .. " " .. name] then addonDB["chars"][realm .. " " .. name]["profile"] = "default"

Assuming you have the addonDB table defined as you posted earlier, you need to create a table at [realm .. " " .. name] before you can store anything at ["profile"].