Can't call table function as method is a nil value

[Merkel]

Hello
I am trying to implement a spawn function where enemies spawn at a specific rate which I am calling from the enemy.lua file to the main file. However, I keep on getting the error:
main.lua:55: attempt to call method 'spawn' (a nil value)
When I try to call the spawn function, I can't figure out why it returns a nil value. It functioned when the function was in the main.lua file but I wanted to make the code neater and have separate files for different game elements.

I have tried to look for similar problems on the forum but haven't found any that fix my problem. Below I have attached my enemy.lua and main.lua files so you can understand what might be causing the error.

enemy.lua

(1.93 KiB) Downloaded 109 times

main.lua

(8 KiB) Downloaded 89 times

[pgimeno]

I think the problem is in enemy.lua. In line 52, you're doing this:

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    return setmetatable({mapWidth = mapWidth, mapHeight = mapHeight}, enemies)

However, the enemies table does not have an `__index` metamethod. I can't check because you haven't provided enough code, but I think that inserting this line after line 2 will work:

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enemies.__index = enemies

Alternatively, you could change line 52 to do this instead:

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    return setmetatable({mapWidth = mapWidth, mapHeight = mapHeight}, {__index=enemies})

[Merkel]

Thank you
This fixed my issue. I am new to Lua and Love so I was unaware I had to use the '__index' metamethod for the code to function. I appreciate the support