nested subpanels via references

[astroboy]

Hi I am building a simple program to verify the working  before building it further.

I am using Labview 7.1. pls see the attached.

In it, there is a main vi called subpanel that is supposed to run first

Also there are 2 container.vis that are responsible for running subpanels

Container.vi opens subpanel to reveal login.vi and container1.vi opens subpanel to reveal 3 functions

I am connecting the all vis by means of control references.

Here's how the sequence works;

subpanel > container > login > container1 > choose one of three functions > back to login

The problem is that the error is "the object reference is invalid"

And how do I make xxx.done and cancel buttons work?

Would appreciate your help to help fix the bug.

Clement

[F._Schubert]

Hi astroboy,

I get missing auto_error.vi

Felix

[Eli_S]

Hi Astroboy,

Yes, as mentioned above auto_error.vi is missing in login.vi which makes it un-executable. Is this also your case or did you forget to include the vi in the Zip file you posted?

[astroboy]

Hi  Felix and Elis,

Sorry. I forgot to add.

Here it is. Thanks alot.

[F._Schubert]

Hi astroboy,

The call by reference is not correctly used. You need to open the VI with a reference and then wire the opened VI to the call by reference node.

In addition I have several concerns about your code (considering it a quick draft):
* You insert the vi into the subpanel inside the while loop, but remove it outside.
* The order of calling the VI (thus setting the control values) and running the VI (thus reading the control values in the vi) is wrong (but the error still occured when I changed it).
* You should place the references in shift registers. If you have a for loop that iterates 0 times, the reference will become invalid otherwise.

Felix

[F._Schubert]

Hi,

here is a working VI. You don't need the RunVI at all.
As a sidenote, you can register for the stop button in the login.vi as an user event.

Felix

[astroboy]

Thanks Will look into it and get back to you.

Clement