Problems calling SubVI

Hi,
I am currently writing a program in which I need a "pop up" SubVI.
The SubVI opens when the user presses a button and closes again when it is finished. I am doing this with an event structure.
Tha main program consists of several while loops.
When I start the program for the first time, everything will run fine. If I now stop the main program with the LabView stop button and the restart the program, everything is still running fine.
If I however stop the program by terminating all the while loops in the main program and then restart and Call the SubVI, the main program will behave as if everything works fine, however the SubVI Frontpanel (or the entire SubVI, I don't know) won't open.
I really have no Idea what I did wrong there. Apparently the way I close the program does make a difference. As I undestand it, however it shouldn't, should it?
Or does it matter, that the "Pop Up" Sub-VI is called in an extra SubVI that doesn't pop up?
I have tried to reproduces this scenario in a simple example that I've attached. However, even though it is in all means similar to the real program, here, the error doesn't occur.
Maybe anyone of you had the same problem before or has an idea what happens there?
Thanks for your help!
In the attachments, "test" is the main Program!
Solved!
Go to Solution.
Attachments:
SubVI.vi ‏7 KB
CallSubVI.vi ‏6 KB
Test.vi ‏13 KB

You may have misunderstood my earlier comments. The reason your code does not exit is that you are simply reading the value of the stop button in the loop with the event structure. That loop cannot complete until everything in it has completed. That means it is a MUST to check the stop condition after an event has been processed. Doing it outside of the event structure like your code does will mean that the while loop is sitting there waiting for the event structure to complete. This will never happen once you stop you application using the button as currently written. If you hit the stop button and then follow that with pressing the Call subVI button your application will actually stop. In addition, your event structure will not process the Stop button until the subVI (your pop-up) has actually exited. The event containing that call will not complete until the subVI completes.
I have posted a simple modification to your code that includes some of the suggestions I made earlier.
Mark Yedinak
"Does anyone know where the love of God goes when the waves turn the minutes to hours?"
Wreck of the Edmund Fitzgerald - Gordon Lightfoot
Attachments:
Test-modified.vi ‏17 KB

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Solved!
Go to Solution.
Attachments:
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Jeff·Þ·Bohrer wrote:
A better approach is to set the vi properties programaticly like this:
Jeff, you will be happy to know that I used this tactic in full force on a project recently (lots of dialogs in this program). Not sure how many LabVIEW reboots it has saved me from. Reuse VIs made it even easier to do.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
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