Prompt User for Input Crash on Modify

[nathanf]

Evey time I create a Prompt User for input Express vi, when I create it, and then go back into modify any settings, I get a crash

LabVIEW:  Object reference is invalid.

Error 1055 occurred at Property Node in Configure Prompt User for Input.vi->Configure Prompt User for Input.vi.ProxyCaller

I have Labview 2016 64 bit.

Does this happen to others?  Is there a fix?

[nathanf]

Evey time I create a Prompt User for input Express vi, when I create it, and then go back into modify any settings, I get a crash

LabVIEW:  Object reference is invalid.

Error 1055 occurred at Property Node in Configure Prompt User for Input.vi->Configure Prompt User for Input.vi.ProxyCaller

I have Labview 2016 64 bit.

Does this happen to others?  Is there a fix?

[RavensFan]

Can you attach a VI that demonstrates this?

Is there a particular reason you are using LabVIEW 64 bit?

[nathanf]

Double click on the express VI, and change the message for instance and hit ok to save.

Crashes for me, on multiple computers.  All running win 10.

No particular requirement for 64 bit.  It happened with 32 bit as well.

Thanks!

[dmysliwiec13]

When I open your VI and run it I see the same error but I do not see a LabVIEW crash. However, when I create the same exact block diagram manually in a brand new VI the error goes away. Do you see the same results when you do this?

[RavensFan]

I can't try because I don't have LV 2016.

But another interesting thing to try is to right click on the express VI and pick Open Front Panel.  It will turn it into a subVI that you can open and poke around in.  You shouldn't see an error or get a crash because because the express VI "configuration" code is not running.  But perhaps you can see something inside the newly created subVI that correlates to the error message you saw.

[nathanf]

You are correct, I mis-spoke.  Labivew doesn't crash.  It just has the error shown, and changes made do not apply.

I created it by simply dropping the express vi on a blank vi.

Is there a resource somewhere that has the express vi code that might be corrupt?

I opened the front panel, and it seems to run fine.  The Message box is moved to the bottom of the screen.

Could you create an express vi on a vi save the parent. I am curious if I could edit that one and it would break, or still work.

[dmysliwiec13]

Is the error preventing your code from runnning correctly?

[nathanf]

Once the error happens then the popup message is blank.  If i make the prompt perfectly the first time it works, but if I ever want to change the prompt or title of the popup, it gets the error.  This resets the message to blank, and I have to delete the express vi and create it again.

I am surprised it doesn't seem to happen for others.  I have tried on 4 computers.  Maybe a corrupt file on the installation media?

[Kodester]

Hi Nathanf,

Were all four computers running Windows 10 on 64-bit LabVIEW? I'm curious if this is a version specific error