'Run VI opening' lvproj does not work

Here's the Setup: I do a VI that reproduces a test model (vilib) and he has associated specifications of construction within a project. My idea is to have a VI user (developer) opens and presents a dialog box (select model, enter a name for the new test, GO). Ideally this VI will simply work the opening.

If I create a VI and define its execution proerties on "Run when opened" and open it from the browser to the OS file, the VI behaves as expected: it runs. If I open the VI of any where within a project, it does not work. Why would it be? Is there a solution?

Alright lets take a deep breath...

Warning, the following is my opinion based on my knowledge of LabVIEW and not the inner workings of the NC, I may be wrong about why the decisions were made:

This feature in my opinion was put for many years, as a cheap way and dirty to make it appear as if a VI is executable code (which is sorta maybe but should not be treated exclusively as).  Years if you had a code and you wanted a user to double click on an icon and have, it starts running you'd make an EXE.  Although necessary the application Builder which was extra money and it was a decent amount of steps involved.  New LabVIEW users complained that it was too difficult and he wanted a way to simply double click on a file and that it is then NOR added to this function.  NOR tried also makes it easier to do by adding additional items in the Tools menu to eliminate steps.  Now if you double-click a VI with nothing open, who has run when open setting on, it would be open and run in LabVIEW.  Running as an application source code has several pitfalls and issues, and in other languages (no scripting) that would not be tolerated.  But it was a hacky way to satisfy beginners of LabVIEW.

LabVIEW has subsequently obtained projects and an easier way to make EXE (always requiring the application Builder).  Now using the source to a project, looked and behaved more as a source in other text-based languages.  Opening in this respect a VI would be the equivalent of opening a text file in Notepad.  And given the behavior of open text and have it automatically start running from your source would be a bad thing.  The State of the source can be easily changed which is one of the reasons why binarys must be used in these situations.

So essentially, this feature is old and broken.  Should not probably exist at all, and the fact that there is NO bend to the will of those who don't know not what was best for the language as a whole.  This feature must either be removed all together, or be updated to run in a project which I hope I made clear is probably not the best solution.  A third option would be to simply update the documentation indicating the current behavior.

If you want to run a VI opening this feature, but open the VI project.  Instead simply open the VI of your Explorer of files, or file > open in LabVIEW.  Opening a project is indicative of the IDE you try to change the source, in which case it does not run when opened.

The good news is that neither has a place where you can suggest new features or improvements for LabVIEW.  If there are a people who agree with your new idea they kudo it and enough Bravo causes OR to examine these features.  If it is important for you, and there is no suitable work around, I'd make a post here.

Tags: NI Software

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