Subpanel Blues

[PaulOfElora]

I sure could use some help with a subpanel issue.  I have 2 user interface VI's that I need to "duplicate, hosting 4 total subpanels.  I saved the VI's as templates, and when I created the VI references, I used option flags 0x40 (Enable simultaneous calls on reentrant VIs) & 0x80 (Prepare to call and forget).  I then start the four VI clones using "Start Asynchronous Call".

2 things go terribly wrong:

1) As expected the subpanels get "populated" with the target VI's, but they are "missing individual data in their indicators".  By that I mean that there are string indicators that display their "controller name" (given to the VI in class data) that are "missing" (not visible).  The "Should look like.png" picture shows these strings, and also the fact that on the lower subpanels, some FP objects are shown or not depending on their class data, this is my intended behavior.  So the displayed FP's in the subpanels have "lost their individual identity" so to speak.  Now, what's strange is that I put in a dialog box in them to display for me the "controller name", and the dialog does show the correct, separate/individual data from both.  So the VI clones both "know who they are" - they're just showing!  Bizarre! Yes, I think so too!

2)  Perhaps out of guilt, LabVIEW also gives me 4 "bonus" VI's displayed - the 2 pairs of VI's also appear as separate windows (see the picture "Bonus CLones.png").  These 4 separate clones properly display their individual class-defined data - they "know who they are".

I've attached a couple of snippets also - how I'm creating their VI references, and how I'm starting the async calls.

So confused!! Any ideas, anybody? Thanks in advance, paul

[mcduff]

Hard to tell from just pictures.

1. I call multiple clones to subpanels, see below. I DON't use vits, I use normal VIs that are set to rentrant. I use Call and Forget, the flag is x80.
2. I also use a static reference to call the VIs.

I suggest trying to use normal VIs, not sure why you need VITs.

mcduff

[PaulOfElora]

Good to hear from you McDuff.  I thought I had to use templates because I'm "populating" 2 subpanels with the same VI, see

http://zone.ni.com/reference/en-XX/help/372614J-01/lvhowto/acbr_call_clones/

I have 2 "pairs" of subpanels, using 2 VI's.  But hey, if I can kill the template thing that would be great.  Thanks, I'll try it! paul

[mcduff]

Below is an rentrant VI, two separate instances, running in a subpanel. (The pop-up window has a subpanel in it.)

mcduff

[PaulOfElora]

I definitely gotta try it without the template business  (wonder why they say you need to that? I'm creating separate distinct references...)

[mcduff · Accepted solution]

I didn't see VIT in the link you sent.

The key is setting the properties to reentrant in the VI Properties dialog, otherwise, your VIs won't run concurrently.

mcduff

[PaulOfElora]

Mucho thanko as always McDuff!

[PaulOfElora]

Ruh-roh - So I created references with strict typing as in the attached snippet, with option 0x80.  Not quite exactly as McDuff did, but it seems equivalent.  Now I get error 1576 for every Async call - "A Start Asynchronous Call node received a reference input that was not configured to allow asynchronous calls. To fix this error, include either the 0x80 option flag or the 0x100 option flag when you open the reference with the Open VI Reference function."  But but I did use 0x80!  All 4 of of vi's are "Preallocated Clone" execution.  Ideas? thanks, paul

[mcduff · Accepted solution]

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@PaulOfElora wrote:

Ruh-roh - So I created references with strict typing as in the attached snippet, with option 0x80.  Not quite exactly as McDuff did, but it seems equivalent.  Now I get error 1576 for every Async call - "A Start Asynchronous Call node received a reference input that was not configured to allow asynchronous calls. To fix this error, include either the 0x80 option flag or the 0x100 option flag when you open the reference with the Open VI Reference function."  But but I did use 0x80!  All 4 of of vi's are "Preallocated Clone" execution.  Ideas? thanks, paul

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For some reason I can't insert pictures into the response.

1. Go to the Application Control pallet and get Static VI Reference.
2. Drop your VI into this Control.
3. Use the VI Name Property and wire that to the Open VI.
4. This is what I did in my earlier post that has a picture.

See this thread

mcduff

[PaulOfElora]

That worked, McDuff, thanks very much again.  I need to learn more about these VI references - lots going on under the hood - paul