[Sharlikran]

Warning: Spoiler

Which line is 2285? If it is "if cptable[setId][slotIndex] ~= nil then" then the table does not have the values at the time it is looked at. So while you are saying "~= nil" the table, setId, and slotIndex need to be defined.

if cptable[setId] == nil then cptable[setId] = {} end
if cptable[setId][slotIndex] == nil then cptable[setId][slotIndex] = {} end

The table will be empty and not nil.

However, I don't think you can have cptable[setId][slotIndex] = nil, if I understand correctly because nil is not important so it would just be cptable[setId] = <<whatever>>

Ooops I didn't see that the error was from the Zos code itself and not your code. You have done something to cause an error in the ZOS code. I do not know the CP system at all. Sorry for posting.