--The machine gun item

--Problem: the RunScript part in OnSpellStart clearly isn't working because the script that it's running is supposed to print a simple message but it doesn't. There are no errors in the console.
    "item_ak_stickarena"
    {
        "ID"                            "4126"
        "BaseClass"                     "item_datadriven"
        "AbilityBehavior"               "DOTA_ABILITY_BEHAVIOR_POINT | DOTA_ABILITY_BEHAVIOR_CHANNELLED"
        "AbilityUnitTargetTeam"         "DOTA_UNIT_TARGET_TEAM_ENEMY"
        "AbilityUnitTargetType"         "DOTA_UNIT_TARGET_HERO"
        "AbilityUnitDamageType"         "DAMAGE_TYPE_PURE"
        "AbilityChannelTime"            "50"

        "AbilityCastAnimation"          "ACT_DOTA_ATTACK"
        "AbilityTextureName"            "item_ak"
        "Model"                         "models/items/sniper/machine_gun_charlie/machine_gun_charlie.vmdl"
        //  Stats
        //-------------------------------------------------------------------------------------------------------------
        "AbilityCastRange"              "%projectile_distance"
        "AbilityCastPoint"              "0.2"
        "AbilityCooldown"               "4"
        "AbilityDamage"                 "150"

        //  Item Info
        //-------------------------------------------------------------------------------------------------------------
        "AbilityManaCost"               "0"
        "ItemCost"                      "0"
        "ItemInitialCharges"            "0"
        "ItemDroppable"                 "1"
        "ItemSellable"                  "0"
        "ItemRequiresCharges"           "0"
        "ItemShareability"              "ITEM_NOT_SHAREABLE"
        "ItemDeclarations"              "DECLARE_PURCHASES_TO_TEAMMATES | DECLARE_PURCHASES_TO_SPECTATORS"

        "MaxUpgradeLevel"               "1"
        "ItemBaseLevel"                 "1"

        "precache"
        {
            "model"                     "models/items/sniper/machine_gun_charlie/machine_gun_charlie.vmdl"
        }

        "OnEquip"
        {
            "RunScript"
            {
                "ScriptFile"            "equip.lua"
                "Function"              "EquipWeapon"
                "NewWeaponModel"        "models/items/sniper/machine_gun_charlie/machine_gun_charlie.vmdl"
            }
        }

        "OnUnequip"
        {
            "RunScript"
            {
                "ScriptFile"            "equip.lua"
                "Function"              "UnequipWeapon"
            }
        }

        "OnSpellStart"
        {
            "RunScript"
            {
                "ScriptFile"            "items/ak.lua"
                "Function"              "InitializeMachineGun"
                "Target"                "POINT"
                "TicksBetweenBursts"    "%ticks_between_bursts"
                "BurstCount"            "%burst_count"
                "ProjectileSpeed"       "%projectile_speed"
                "ProjectileDistance"    "%projectile_distance"
                "ProjectileRadius"      "%projetile_radius"
                "ThinkInterval"         "%think_interval"
                "ChannelTime"           "%channel_time"
            }
        }

        "OnChannelFinish"
        {
            "RunScript"
            {
                "ScriptFile"    "items/ak.lua"
                "Function"      "StopMachineGun"
            }
        }

        "OnProjectileHitUnit"
        {
            "Damage"
            {
                "Target"                "TARGET"
                "Type"                  "DAMAGE_TYPE_PURE"
                "Damage"                "%AbilityDamage"
            }
            "FireSound"
            {
                "EffectName"            "Hero_Sniper.ProjectileImpact"
                "Target"                "TARGET"
            }
        }

        "Modifiers"
        {
            "modifier_item_ak"
            {
                "Passive"               "1"
                "IsHidden"              "1"
                "Attributes"            "MODIFIER_ATTRIBUTE_MULTIPLE"

                "Properties"
                {
                    "MODIFIER_PROPERTY_MOVESPEED_BONUS_UNIQUE"  "%bonus_movement_speed"
                }
            }
        }

        //  Special
        //-------------------------------------------------------------------------------------------------------------
        "AbilitySpecial"
        {
            "01"
            {
                "var_type"              "FIELD_INTEGER"
                "projectile_distance"   "1500"
            }
            "02"
            {
                "var_type"              "FIELD_INTEGER"
                "projectile_damage"     "150"
            }
            "03"
            {
                "var_type"              "FIELD_INTEGER"
                "projectile_radius"     "30"
            }
            "04"
            {
                "var_type"              "FIELD_INTEGER"
                "projectile_speed"      "2000"
            }
            "05"
            {
                "var_type"              "FIELD_INTEGER"
                "bonus_movement_speed"  "50"
            }
            "06"
            {
                "var_type"              "FIELD_INTEGER"
                "channel_time"          "50"
            }
            "07"
            {
                "var_type"              "FIELD_INTEGER"
                "burst_count"           "3"
            }
            "08"
            {
                "var_type"              "FIELD_FLOAT"
                "think_interval"        "0.3"
            }
            "09"
            {
                "var_type"              "FIELD_FLOAT"
                "ticks_between_bursts"  "2"
            }

        }
    }

--items/ak.lua
require('libraries/timers')

function InitalizeMachineGun(keys)
    print('[STICKARENA] Initalizing Machine Gun')

    local caster = keys.caster

    caster.ticknumber = 0

    Timers:CreateTimer(0.01, -- Start this timer 30 game-time seconds later
    function()

        print('[STICKARENA] MachineGunThink')
        if caster.ticknumber * keys.ThinkInterval >= keys.ChannelTime then
            print('[STICKARENA] notice: caster.ticknumber * keys.ThinkInterval >= keys.ChannelTime')
            return
        elseif caster.ticknumber == -1 then
            print('[STICKARENA] notice: caster.ticknumber == -1')
            return
        end

        local totalmodulus = keys.TicksBetweenBursts + keys.BurstCount
        local ticknumber = caster.ticknumber
        local interval = ticknumber % totalmodulus
        local ifinterval = keys.BurstCount - 1

        --Fire Projectile
        if interval <= ifinterval then
            local vec = keys.target_points[1]
            local diff = vec - caster:GetAbsOrigin()
            diff.z = 0
            local dir = diff:Normalized()

            local info =
            {
                Ability = keys.ability,
                EffectName = "particles/linear_projectiles/sniper_base_attack.vpcf",
                vSpawnOrigin = caster:GetAbsOrigin(),
                fDistance = keys.ProjectileDistance,
                fStartRadius = keys.ProjectileRadius,
                fEndRadius = keys.ProjectileRadius,
                Source = caster,
                bHasFrontalCone = false,
                bReplaceExisting = false,
                iUnitTargetTeam = DOTA_UNIT_TARGET_TEAM_ENEMY,
                iUnitTargetFlags = DOTA_UNIT_TARGET_FLAG_NONE,
                iUnitTargetType = DOTA_UNIT_TARGET_HERO + DOTA_UNIT_TARGET_BASIC,
                fExpireTime = GameRules:GetGameTime() + 10.0,
                bDeleteOnHit = true,
                vVelocity = dir * keys.ProjectileSpeed,
                bProvidesVision = false,
                iVisionRadius = 0,
                iVisionTeamNumber = caster:GetTeamNumber()
            }
            caster:EmitSound("weapons/hero/sniper/projectile_impact01.wav")
            dir = RotatePosition(Vector(0,0,0), QAngle(0,RandomInt(-3,3),0), dir)
            info.vVelocity = dir * keys.ProjectileSpeed
            ProjectileManager:CreateLinearProjectile( info )
        end

        caster.ticknumber = caster.ticknumber + 1
        return keys.ThinkInterval -- Rerun this timer

    end)
end

function MachineGunEnd(keys)
    keys.caster.ticknumber =  -1
end