Help with Slash Command implementation

[Bloodier]

I'm creating a simple addon that shows information like XP to level up on the chat. It's called by typing /minXP. I have the following code (using an .xml to be able to use OnLoad), but the game keeps throwing an unknown command error each time I call it.

local function cmdHandler(msg, editbox) 
	showXP();
end

function MinimalXP_OnLoad()
	SLASH_MINXP1= "/minXP";
	SlashCmdList["minimalXP"] = cmdHandler;	
end

[Clamsoda]

Here is a basic outline of a pure Lua implementation of custom slash commands.

Note: The numbers go from 1 to n.
Note: For this implementation, I have used an anonymous function, but you can certainly point to an already existing one (showXP in your case).
Note: FUNCTIONNAME is arbitrary; make sure it is unique. I typically name them: "CLAMRAIDLOCKOUTS" or "CLAMXP", et cetera.

SLASH_FUNCTIONNAME1 = "/command"
SLASH_FUNCTIONNAME2 = "/othercommand"
SLASH_FUNCTIONNAMEn = "/anothercommand"
SlashCmdList["FUNCTIONNAME"] = function()
    -- Code here.
end

[Bloodier]

Put it that way, still getting the error

SLASH_MINXP1= "/minXP";
	SlashCmdList["MINXP"] = showXP();

[Dridzt]

Remove the () from your function name.
You need the function reference not a function call.

[Bloodier]

Now working, thank you