Dialog box problem when controlling front panel remotely

I have encountered an issue with the Web Publishing Tool- I have a VI that calls a subvi that uses the Promt User for Input function. When controlling the front panel from another computer I get a message saying that you "Cannot control subVI front panels remotely" and points you to the machine actually running LabView to enter the information in the Prompt User dialog box. I set the subVI front panel to show when called, which does show the front panel of the subVI, but still get the error related to the dialog box.
Is there any way to make this work? Am I missing something obvious?
Thanks,
Nathan

Hi Nathan.
There are some limitations with dialog boxes in remote applications. This tutorial has some good examples and explanations on functionality to avoid with web applications. Additionally, the LabVIEW online Help offers some general guidance for Viewing and Controlling Front Panels Remotely, which may help you in further developing your application.
Hope that helps!
Lorielle P.
Applications Engineer
National Instruments

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Button Function Problem When Showing Front Panel of Sub VI

Good Afternoon,
I have a created a simplified version of a much more complicated vi to illustrate the problem I am having. Attached is a main vi and a sub vi. The main vi has a boolean which says to open or close the front panel of the sub-vi. This works great. However, the other push button ( " My Button Function" ) on the main vi does not work properly when the sub-vi front panel is being displayed. It is supposed to be a "switch until released" button. However, if you try to click and hold it down while the sub-vi panel is displayed it acts as if I am clicking the button rather than being able to hold it down? I was wondering why showing the sub-vi front panel makes this happen? And also, if anyone has any recommendations to fixing this problem?
Attachments:
main.vi ‏12 KB
sub.vi ‏5 KB

What is happening is the loop is running very fast. It is constantly reading the open SubVI button and opening the subVI if true, even if the subVI front panel is already open. If you are trying to hold down the other button, the opening of the subVI front panel is taking away the focus from the main VI and thus acting like you let up on the button.
Maintain the status of the subVI in a shift register and only open or close it if the status changes. See attached Main VI.
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main.vi ‏12 KB

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Reference to control on main front panel fails when subvi front panel is closed?

Hi All,
I'm experiencing an odd bug. In my code, I use a subvi to control a piece of hardware. This subvi has controls for all of the functions of my hardware.
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Solved!
Go to Solution.

What is your LabVIEW version?
Front panels that are not shown are typically not updated and might not even be loaded into memory.
The presence of certain code elements (e.g. property nodes) often forces the front panel to be in memory even if it is not shown, but I haven't studied it in a long time so there might be subtleties. Maybe somebody from NI can give more details.
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LabVIEW Champion . Do more with less code and in less time .

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hi
my Q is ... is it possible in a VI when a specific condition meet a dialog box appear
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okkkkkkkkkkkkkkk looking for answer

Make build a sub vi which performs these conditions, base on the task selected.
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Hello,
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I am certainly using labVIEW from two months. So, I did not use MAX in my past time. I only used one time to check my USB 6008 device but this is off topic here. I will tell you down here.
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Paul Slaathaug Sr. Support Engineer - Microsoft Word

Dialog Box Problem

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Hello all,
I am using a T61 8898-6dg with XP and r&r 4.10.314
After reinstalling the system from a XP CD I tried to reinstall an R&R backup from a network share.
R&r starts well showed me the backup files and all the files included in the backup. So I was able to select the files I want to recover and the recovery process starts.
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when the magic mouse is not connected it seems to work fine, I usually click the trackpad and the system prompts me for a password - I enter my password and go back to work.
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Noise when using Front-Panel headphone j

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If it is possible to remove the circuit board assembly for the front panel jacks from the case, you can see how the circuit foil "traces" on the board are connected. In my situation, and probably yours, you may find that the mounting screws that hold the circuit board to the computer case will also have the foil traces under them and that those traces will be a common ground to the rest of the circuits on the board. The problem arises because the computer case ground is at a somewhat different "signal" level than the grounds coming into the circuit board from the various "header" connectors, that is, the connectors you mate with the corresponding pins on your sound card, as well as the USB pins, if you choose to hook them up too. There is a great deal of strange noises that can be present in a given motherboard's circuits and associated grounds. All the ground connections from the headers coming into the board should only go to the individual connectors on the front panel. I cut away the foil paths where the grounds were all run together on the circuit board, thus isolating them from one another, as well as cut away the foil under the mounting screws. You may even have to cut foil from both sides of the board, depending on your model. You need to take care not to open up a circuit when making those cuts. A good, sharp Xacto knife or utility knife should work fine.
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This is hopefully a simple problem, but I can't figure out what to search under. I have a program with two loops (Z Only Test and Full Test in Tester Program v2). They do not run at the same time. I would like both loops to interact with an LED on the front panel (Testing). How is this done?
Under Z Only Test, it works fine. I tried to connect it to the sequence (Full Test), but it tells me I can't do that. On odd sequences, for the most part, I would like to have the LED light (TRUE). On evens, off.
Attachments:
code.zip ‏143 KB

rbergs wrote:
Do you mean make the LED a shared variable? How do you do that? I clicked on it and changed it to a variable, but I thought that was like one of the others that I have. I'll give it a try and see what happens.
I would assume whatever works for this would also work for numerical displays as well.
No. I'm not even sure exactly what you mean by clicked on the LED "and changed it to a variable."
Right now you have only a single place where you use that LED. It has a terminal node on your block diagram within a while loop. I don't know how that fits into your overall program architecture as your VI is quite expansive. (Two tips, 1. Don't use stacked sequences. 2. Look into a state machine architecture)
All that happens at that point is your read from a shared variable called "Testing". I'm not sure from where else in your VI that you want to interact with that front panel indicator. Or whether it will conflict with the already written piece of code. I also don't know where this shared variable is written to. But the first idea is have the other sections of the code write to the shared variable and let this one update the front panel indicator.
The second idea is to create a local variable of the front panel indicator. Right click on the terminal within your code and select Create / Local Variable. But again, you will have to be careful with conflicts with the different portions of your code writing to the LED. This is also known as a "race condition".
(Yes you can use either shared variables to store numeric data, or create local variables of numeric controls or indicators.)
I'm a bit nervous about your code. It looks like you have a decent amount of LV experience as you have created quite a sophisticated VI there. However, it doesn't seem like it is easy to expand or modify. It takes up quite a bit of screen real estate. It doesn't use any subVI's even though a lot of the code seems to be duplicated or very similar. And it seems like it uses a lot of shared variables, probably more than necessary.
Message Edited by Ravens Fan on 05-29-2009 01:38 PM

Dialog box appear when condition meet

hi
my Q is ... is it possible in a VI when a specific condition meet a dialog box appear
that contain 2 or more controll SW labeld 1.2.3... represnting diferent task ,when pressing any one of them
relevant function r to be execute ..any one how know plz inform me ..how it could be done .
okkkkkkkkkkkkkkk looking for answer

See here

Dialog box problem when controlling front panel remotely

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