Scripts

HEAL = {}
HEAL.variant = -1

Healing_arts = {{id=176, heal = 50}, {id=177, heal = 10},}

function HEAL.UseHeal(pl, ans)
  if not ans then
    HEAL.heal_arts_on = {}
    for key, art in Healing_arts do
      if HasArtefact(MAIN_HERO, art.id) then
        table.insert(HEAL.heal_arts_on, art.id)
      end
    end
    HEAL.len = length(HEAL.heal_arts_on)-1
    print(HEAL.len, ' - длина 'массива) --Выводит минус единицу - длина массива
    sleep()
    if 0 < HEAL.len <= 4 then  ---ВОТ ЗДЕСЬ ПАДАЕТ СКРИПТ.
      print('Проверка') --НЕ ВЫВОДИТСЯ В КОНСОЛЬ
      HEAL.variant = 1
      local pthheal = "Interface/CustomAbilities/UseFirstAidKit/"
      local options = {}
      local values = {}
      while not values and not options do
      sleep()
      end
      for i=1, HEAL.len do
        print (HEAL.len)
        print('Проверка 2 ', HEAL.heal_arts_on)
        options=pthheal..'Use_'..i..'...'   
        values= artifacts[HEAL.heal_arts_on].name 
        --
      end
      while not options[HEAL.len] do
      sleep()
      end
      options[HEAL.len+1]=Talk.BACK
      Talk.mode = 1

      Talk.NewDialog(GetIconPath('Heal'), pthheal..'Heal', pthheal..'HealDesc', 'HEAL.UseHeal', options, values)
--
--    elseif HEAL.len > 4 then

    elseif HEAL.len <= 0 then
      print('Ai?oe')  ---ТОЖЕ НЕ ВЫВОДИТСЯ В КОНСОЛЬ
      Talk.mode = 1
      Talk.NewDialog("/UI/MessageBox/Warning.xdb#xpointer(/Texture)", pthheal.."WarningNoKit", pthheal.."NoKit", nil)
    end
  elseif ans then
    if HEAL.variant == 1 then
      if 0<ans<5 then
        STALKER.ChangeHealth(artifacts[HEAL.heal_arts_on[ans]].heal)
        RemoveArtefact(MAIN_HERO, HEAL.heal_arts_on[ans])
      end
    end
  end
end

This function is called from the spell book, the first call goes fine, but the second one errors out at the specified location. I don't even know what the problem is, though it's probably related to scope. But how to fix it (and more importantly, what exactly) — I have no idea...