function OnPluginTelnetSubnegotiation (opt, data)

	if opt ~= 201 then

		return

	end

	local msg, content = unpack(utils.split(data, " ", 1))

	print (msg, content)

	if not content or content:len() == 0 then

		_G[msg:gsub("%.", "")]()

	else

		_G[msg:gsub("%.", "")](content)

	end

end

function SendGMCP(message, content)
	if type(message) ~= "string" then
		return nil, "Message name must be a string."
	end
  
	if content ~= nil then
		content = json.encode({content})
		if content == nil then
			return nil, "Invalid input."
		end
		message = ("%s %s"):format(message, content:sub(2, #content-1))
	end
  
	SendPkt(SB_GMCP:format(message))
	return true
end

function CharSkillsGroups (content)

	local EXCLUDED_GROUPS	=	{

		"Antidotes",
		"Avoidance",
		"Constitution",
		"Fitness",
		"Frost",
		"Galvanism",
		"Philosophy",
		"Thermology",

	}

	for k,v in ipairs (JSON.decode("[" .. content .. "]")[1]) do

		system[system.char]	=	{

			skills	=	{

				[v.name]	=	{

					rank		=	v.rank,

				},
			},
	
		}

		if not EXCLUDED_GROUPS [v.name] then

			system[system.char]["skills"][v.name]["abilities"]	=	{}

			local GROUP	=	{group = v.name}

			SendGMCP ("Char.Skills.Get ", GROUP)

		end

	end

end

Run-time error
Plugin: The_System (called from world: Achaea)
Function/Sub: OnPluginTelnetSubnegotiation called by Plugin The_System
Reason: Executing plugin The_System sub OnPluginTelnetSubnegotiation
[string "Plugin"]:223: attempt to call local 'EXCLUDED_GROUPS' (a table value)
stack traceback:
        [string "Plugin"]:223: in function '?'
        [string "Plugin"]:560: in function <[string "Plugin"]:548>
Error context in script:
 219 :    },
 220 :  
 221 :   }
 222 : 
 223*:   if not EXCLUDED_GROUPS {v.name} then
 224 : 
 225 :    system[system.char]["skills"][v.name]["abilities"] = {}
 226 : 
 227 :    local GROUP = {group = v.name}

function CharItemsList (content)

	print ("CharItemsList ", content)

end