# 0086: Invalid array index

The script engine of Liberty City Stories and Vice City Stories games only allows [local variables](https://docs.sannybuilder.com/language/data-types/variables#local-variables) to be [array indexes](https://docs.sannybuilder.com/language/data-types/arrays#general-syntax).

**Possible solutions:** replace the global variable with a local variable:

```
$array($index,1) // error
$array(0@,1) // OK
```