Can't get item list!!

Hi everbody. I'm making my first game in Stencyl, and I don't know every resource or tool yet. Sorry about my english, I'm Brazilian and my english is very weak.

Anyway,

I want to create random actors with list. But list attribute only have number and text item type. I try to add actor type attribute to the list, but when I try to get a item by the id, I get an error saying that I can't get a null object.

Can anyone help me. Thanks.

Are you using a game attribute for your list? I have used a normal attribute list  (I mean not a game attribute) and it is possible to add actors to that - there is no limitation about only numbers or text for this type of attribute.

thanks for answer Mark. No, Im using normal att, but can't get the values. can you or anyone else show me with a printscreen the logic using for set and get itens from a lists, using actor types please.

UPDATE !!

I make it! \o/

I'm using the following logic:

set [actor type attribute] to > get item # > absolut value of > random number between 0 and 3 > from [my list]

Excellent! Good luck with the game! 

Thanks! asap I'll up a demo here!!