A simple external AI Lua error

[ib2002]

I'm working AI project for school that involves reinforcement learning. I use wesnoth as a test environment. The project interfaces to wesnoth using Lua. I tried the Lua interface from another repository and it all works fine except for the most basic CA that supposed to just pass the turn:

Code: Select all

local ca_pass = {}

function ca_pass:evaluation()
    return 999980
end

function ca_pass:execution(cfg, data)
    
end

return ca_pass

This seems to generate an error

Code: Select all

attempt to index a nil value

I searched high and low and read through the creating custom AI manual on this site, but I can't seem to find a clue yet. Any help will be greatly appreciated.

[dwarftough]

This seems to generate an error

Code: Select all

attempt to index a nil value

It usually says where it's attempted to index a nil value, a trace with line numbers. Could you provide one? It would help finding the cause

[Celtic_Minstrel]

I'm pretty sure the code you posted cannot cause that error. We need more information.