Re : What is the benefit of passing variables to Vi's instead of Refs?

[eximo]

One more thing, if I want to call the coordinator, from either vi, depending on which vi is started first how do I do that?

for instance "That Vi" is called first, somehow the coordinator is executed, then "This VI" is also opened at a later time.

Or, "This VI" is called first, the coordinator is executed, then "That VI" is also opened at a later time.

Is there a way to detect if a vi is already open and open it or not open it (case statement) depending on it's state?

[JÞB]

You can also look to see the vi's run state with a property node.

In you case I would probably create a launcher for all three vis that call the run method for each and closes itself