I can’t figure out why this isn’t working. My hero counts 104 coins, and then the code gets an error saying “coin is undefined.”

```
# You need exactly 104 gold.
less = "Nimis"
more = "Non satis"
requiredGold = 104
# This function calculates the sum of all coin values.
def sumCoinValues(coins):
coinIndex = 0
totalValue = 0
# Iterate all coins.
while coinIndex < len(coins):
totalValue += coins[coinIndex].value
coinIndex += 1
return totalValue
def collectAllCoins():
item = hero.findNearest(hero.findItems())
while item:
hero.moveXY(item.pos.x, item.pos.y)
item = hero.findNearest(hero.findItems())
while True:
items = hero.findItems()
# Get the total value of coins.
goldAmount = sumCoinValues(items)
# If there are coins, then goldAmount isn't zero.
if goldAmount != 0:
# If goldAmount is less than requiredGold
if goldAmount < requiredGold:
# Then say "Non satis".
hero.say("Non satis")
# If goldAmount is greater than requiredGold
if goldAmount > requiredGold:
# Then say "Nimis".
hero.say("Nimis")
# If goldAmount is exactly equal to requiredGold
if goldAmount == requiredGold:
# Then collect all coins:
hero.moveXY(coin.pos.x, coin.pos.y)
pass
```

It’s this line: ` hero.moveXY(coin.pos.x, coin.pos.y)`

that always has the error. I do ` hero.moveXY(coin.pos.x, coin.pos.y)`

or `hero.moveXY(coin.pos.x, coin.pos.y)`

and `hero.move(item.pos)`

. It always gets the same error!