[Closed] Using an array of another rollout

Hi there

I have 2 rollouts A and B and i want to use one array of rollout A in rollout B

Whan the rollout A is open and i like to use a_ar in rollout B i just have to say

on B open do (	B_Ar = for i =1 to A.a_ar.count ...... )

Now my problem is that when the rollout A is not open the script face an error .I try

if A.open  != false do ........

But when A is not open the script complain – Unknown property: “open” in undefined –
what should i do or what is the correct way of doing this.
Do i have to create an external file in A rollout and load it when B is open?

Thanks in advance