Making an Output Required

[DJDDA]

I want to make a sub VI output Required. This is apparently not an option. Am I missing something here?

(VI attached. Notice that this can't work as a sub VI without wiring the output terminal because LabVIEW will crash.)

[altenbach]

If LabVIEW crashes, we a more serious problem. Can you tell us your LabVIEW version and exact steps on how to recreate the crash?

What is your setting for automatic error handling?

[DJDDA]

Erm, sorry, "LabVIEW crashes" is really not what I meant. (I was in a hurry... ironic in that it's making this take longer, eh?)

I get the "Error XXXX occurred at blah blah blah... Continue/Stop?" pop-up. Yeah, that's automatic error handling (not a "crash"), but I like automatic error handling. I don't want to turn it off. Thus, I need to make sure those terminals are always wired.

Should I try to dig up that "make a feature suggestion" page, or has this issue been covered already?

[PhillipBrooks]

A couple of people have managed to create a VI with required outputs. The 'secret' han not yet been revealed, but you can monitor the discussion on the LAVA forums... I would like to know how too...

(Even some NI folks would like to know how this was done, so it certainly sounds like a "suggestion page" candidate

[_S_G]

I still don't see why the VI would crash if the output is not connected. Which VI are you talking about that needs a required output?

Message Edited by S G on 12-11-2007 01:20 PM

[altenbach]

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S G wrote:

I still don't see why the VI would crash if the output is not connected. Which VI are you talking about that needs a required output?

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Read further, he's not crashing, just bothered by the automatic error handling if the error output is not wired and an error occurs. 😉

[Gabi1]

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Phillip Brooks wrote:
A couple of people have managed to create a VI with required outputs. The 'secret' han not yet been revealed, but you can monitor the discussion on the LAVA forums... I would like to know how too...

(Even some NI folks would like to know how this was done, so it certainly sounds like a "suggestion page" candidate

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yea, i am still waiting on them to give it away. my patience is stretched i would love to have this feature.

[smercurio_fc]

Anyone know if there was any further development on this? The thread on the LAVA forums seemed to take a detour. I was playing around with this a while back using LabVIEW 7.1.1 and scripting, but got side-tracked by real work, and I never went back to it. This morning I decided to try doing it with a hex editor and was successful, though there's the odd side-effect that the Info window shows the correct display in terms of its wiring property, but when you right-click on the indicator it doesn't. And, yes, placing the subVI in a new VI causes the parent to indicate that you must wire to the output, as expected. That part is just "neat".