Help nonconsistant recurring error

[jojoa1997]

Code

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

function npc_spawner(pos, SPAWN_TYPE)
    local MAX_NPC = 15
    local count = table.getn(minetest.env:get_objects_inside_radius(pos, 50))
    if count == nil then
        count = 0
    end
   
    if count <= MAX_NPC then
        minetest.env:add_entity({x=pos.x+math.random(-1,1),y=pos.y+math.random(2,3),z=pos.z+math.random(-1,1)}, SPAWN_TYPE)
    end
end

Error

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all

11:27:03: ERROR[main]: ========== ERROR FROM LUA ===========
11:27:03: ERROR[main]: ...minetest\bin\..\mods\mod_test\peaceful_npc/items.lua:4: attempt to index field 'env' (a nil value)
11:27:03: ERROR[main]: stack traceback:
11:27:03: ERROR[main]:     ...minetest\bin\..\mods\mod_test\peaceful_npc/items.lua:4: in function 'npc_spawner'
11:27:03: ERROR[main]:     ...minetest\bin\..\mods\mod_test\peaceful_npc/items.lua:53: in main chunk
11:27:03: ERROR[main]:     [C]: in function 'dofile'
11:27:03: ERROR[main]:     ...\minetest\bin\..\mods\mod_test\peaceful_npc\init.lua:6: in main chunk
11:27:03: ERROR[main]: =======END OF ERROR FROM LUA ========

[PilzAdam]

If you call this function when the code is executed the first time (for registration of node, entities, etc.) minetest.env isnt defined. You can only call this callbacks (like nodedef.on_punch).

[jojoa1997]

If you call this function when the code is executed the first time (for registration of node, entities, etc.) minetest.env isnt defined. You can only call this callbacks (like nodedef.on_punch).

fixed in irc. please close this