To look up the value of a property although it may not exist, you can use the at -sign “@” as prefx:

● @$list.{5} ⟹The ffth element if the list exists and has a fth element, null otherwise

● @$list ⟹The list if this variable exists, null otherwise

● @$list.{5}.{1} ⟹The frst element of the ffth element of $list, if it exists, null otherwise

As you can see, an error is already prevented if any link in the property chain does not exist. But use the @ prefx with care, since error messages are really helpful for detecting problems in your scripts. The @ prefix only suppresses property-related error messages and does not change any in-game behaviour.