Run two different VIs in parallel

[MT_at_home]

Hello,
i'd like to know how to call and run a second VI in parallel to my main one with both windows open because i want to acces controls on both.
In my case i have a userinterface for a machine on the Main.vi and i want to simulate some machine behaviour and mechanical actions that have to be performed in the second VI.
I am communicating over a third VI keeping my global variables.
Lets call them Main.vi, Controls.vi and Globals.vi for this case.
I'm new to labview and would be happy for some advice to a simple solution.

[GerdW]

Hi MT,

just run them in parallel - with no dataflow dependencies!

[Yddet · Accepted solution]

Hello,

A simple option is to put Controls.vi in the main and select "Show front panel when called" in Vi properties->Window appearance->Customize. It will need to be in parallel of your other processes.

Yddet 

[MT_at_home]

Thx, is there an option to kill Controls.vi when i stop the Main.vi?

[MT_at_home]

Figured it out by myself, just put a terminal to the stop button of my Controls.vi and wired it to the stop of Main.vi.

[crossrulz]

---

@MT_at_home wrote:

Figured it out by myself, just put a terminal to the stop button of my Controls.vi and wired it to the stop of Main.vi.

---

But that would either mean your Controls.vi is in series with your main loop or you are not getting an updated value.  I would use a Queue, Notifier, or User Event to have your main VI send a message to your Controls.vi to command it to stop.

[MT_at_home]

Okey, found some buggy behavoiur in my way...
So what's the correct way of doing it then, i have no idea sadly.

[GerdW · Accepted solution]

Hi mt,

as said before: call both subVIs in parallel without dataflow dependencies!

(That's basic LabVIEW knowledge, so I suggest to take the training resources offered in the header of this LabVIEW board. Also note the self-paced courses are free until end of April!)

[johntrich1971]

---

@MT_at_home wrote:

Okey, found some buggy behavoiur in my way...
So what's the correct way of doing it then, i have no idea sadly.

---

You've been told the correct way of doing it. You've not shared your code so we can't tell you what you're doing wrong. Buggy behavior is not a proper explanation.

[MT_at_home]

You were right, putting them in parallel without any wire-connections was the correct way i didn't know to use in the first place.
By creating local variables and using these instead of wiring from one loop to the other the problem was solved, thx 4 the advice.