How acces flow.set(), flow.get() with var in json

Hi,
I am problem with var flow.set() and flow.get()
example of code:

var tmp ={'start':0,'open':0,'close':0};
flow.set('X1_1',tmp);
flow.set('X2_2',tmp);

when I want to write in the variable with flow.set('X1_1.open',45) , it writes in all the flows X1_1 but also in X2_2 which contain open with the value 45.

maybe I must not write the syntax well I am seriously stuck.

Thanks for help.

Hi. Read this: Variables seem linked somehow - #5 by Steve-Mcl

Hi,
Thanks for reponse.

I'm used

var tmp={"open":0,"close":1};
flow.set("TEST_1",RED.util.cloneMessage(tmp));
flow.set("TEST_2",RED.util.cloneMessage(tmp));
flow.set("TEST_1.close",10);

It's good now.
Thanks again.

Sylvain