While loop doesn't stop until 2 more clicks

I have to say I am really not familiar with LV at all, but Im learning.
So, why is that after I clicked stop bottom, I had to click my OK button twice, then my program stopped. Why it can't stop immediately?
Besides, if I want to some the dice result by array, which wire am I missing?
Thank you!
Solved!
Go to Solution.
Attachments:
dice.vi ‏15 KB

Hi RawtoLV,
You have a while loop within a while loop. When you run the other while loop stops when you pressed the stop button, the inner while loop still runs. Since your OK button is using Latch when released, what i noticed is that when you pressed that OK button, it quickly switched to from true to false which didn't stop that while loop operation (could be due to the wait). May I ask what are you actually doing with the sequence structure?
I would suggest using event structure instead (http://zone.ni.com/reference/en-XX/help/371361K-01/glang/event_structure/):
here some more info on event structure:
http://www.ni.com/white-paper/3331/en/
http://www.youtube.com/watch?v=8eO64fo3Pho
Warmest regards,
Lennard.C
Learning new things everyday...

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Message Edited by devchander on 01-10-2006 06:15 AM
Message Edited by devchander on 01-10-2006 06:19 AM
Attachments:
arrayinouttestnewfinalnew4.vi ‏59 KB
arrayinouttestnewfinal.vi ‏63 KB

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SPoleLakeChirp.vi ‏199 KB

Dennis and altenbach- Thank you both for your patience.
I was trying to do just what Dennis suggested-"As I said, setting a local variable is one way." even before posting to this forum, but I couldn't get my local variables to reflect changes made elsewhere in the program and I wasn't able to wire from them because they were writes. The critical part I was missing was how to change a local variable from a write to a read. It was staring me in the face the whole time- just right click. When I finally found it, my problems were solved.
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SPoleLakeChirp.vi ‏210 KB

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Attachments:
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Ok. I had a chance to take a look at your code and I think you don't quite understand the concept of "dataflow". Let me see if I can help.
First of all...when I refer to your upper structure, I am referring to the first while loop, sequence structure, and subsequent while loops. When I refer to your lower structure, I am referring to the while loop containing the event structure. Just so we get our terminology straight.
I believe that you are under the illusion that your upper structure contains three parallel while loops. It does not. It contains three SERIAL while loops. There is dataflow dependency between the while loops. The sequence structure requires data that is not available until the first while loop has finished executing, so the sequence structure cannot start executing until the first while loop has terminated.
The second while loop requires inputs from the first frame of the sequence structure (which, by the way, you don't need and should get rid of...the sequence structure, I mean), so it cannot start executing until the first frame of the sequence structure has terminated. The third while loop requires inputs from the second while loop...so, again, the third while loop cannot run until the second while loop has finished executing.
Now, for your stop button. You have that global stopping all three loops. So here's what is happening in your program:
Your program starts. The first while loop executes in parallel with the loop which contains the event structure.
At some point you press the "stop" button. Both the first while loop and the loop containing the event structure finish executing.
The first frame of your sequence structure executes.
The second frame of your sequence structure executes. The second while loop reads the "stop" value from the global, so it executes once and then finishes.
The third while loop starts executing. Again, the loop reads the "stop" value from the global, so it executes once and then finishes.
Then your program terminates.
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Generate Occurrence2.vi ‏23 KB

Thank you for responding to my question. I think I understand it now. The first click of the Set Occurrence button, the lower loop gets out of the current iteration. At next iteration, even though the conditional terminal sees the True signal, it can not exit because it's waiting for the loop to finish. Only after we send the Occurrence again then the loop will finish it's task and exit. Again, thank you for your help.
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While loop doesn't stop until 2 more clicks

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