Running executable as a service, the front panel doesn't display properly upon the second logon.

I am running a LabView executable as a service. When I logon the first time, I see the front panel correctly. When I logoff, the service still runs properly. If I logon a second time, the frontpanel never fills in. (I see the desktop through the front panel). The service still runs, but when I click on any menu, the computer freezes. Any suggestions? (Other than not logging on twice)

Hi chach,
I hate to say it, but I'm surprised it even runs once. If you check out:
this link
It says the following:
"The service must run without a user interface."
As the article mentions, you could still have a separate front panel that communicates with the service, but the service itself probably doesn't have an accessible front panel.
Joe Z.

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Panel doesn't display properly until I resize the frame

Hiya folks,
I'm currently trying to write a simple piece of music notation software. This is my first time using swing beyond a relatively simple JApplet and some dialog stuff. Anywho, I ran into a pretty discouraging issue early on. So far I've got a frame with a menu bar and a toolbar on the bottom border. The toolbar contains a button which should draw a new staff panel containing 11 panels (potentially more) within it, alternating between lines and spaces. Sort of like this:
import javax.swing.*;
import java.awt.*;
public class Staff extends JPanel {
   private static JPanel nsp1,nsp3,nsp5,nsp7,nsp9,nsp11;
   private static JPanel nsp2,nsp4,nsp6,nsp8,nsp10;
   private ImageIcon image= new ImageIcon(this.getClass().getResource( "icons/treble clef.gif"));
    public Staff(){
    setLayout(new GridLayout(11,1));
    add(nsp1= new NoteSpace());
    add(nsp2= new LineSpace());
    add(nsp3= new NoteSpace());
    add(nsp4= new LineSpace());
    add(nsp5= new NoteSpace());
    add(nsp6= new LineSpace());
    add(nsp7= new NoteSpace());
    add(nsp8= new LineSpace());
    add(nsp9= new NoteSpace());
    add(nsp10= new LineSpace());
    add(nsp11= new NoteSpace());
static class NoteSpace extends JPanel{
    public NoteSpace(){
    setPreferredSize(new Dimension(this.getWidth(),2));
static class LineSpace extends JPanel{
      public LineSpace(){
      setPreferredSize(new Dimension(this.getWidth(),1));
      public void paint(Graphics g) {
          super.paint(g);
          g.drawLine(0, (int) super.getHeight()/2, (int)super.getWidth(), (int)super.getHeight()/2);
}Anyway, this panel displays as a tiny box wherein nothing is visible until I resize the frame. Really frustrating. And I have have no idea what the problem might be. Here's the actionlistener:
jbtcleff.addActionListener(new ActionListener (){
        public void actionPerformed (ActionEvent e){
            staff.setBounds(50,panel.getHeight()/2,panel.getWidth()-50,panel.getHeight()/2);
            panel.add(staff);
            staff.repaint();
        });...which is located in a custom jtoolbar class within the Main class, an extension of JFrame:
public class Main extends JFrame{
   JMenuBar jmb=new CustomMenuBar();
   JToolBar jtb= new CustomToolBars("ToolBar");
   static boolean isStaff=false;
   static boolean isNote=false;
   static JPanel panel = new JPanel();
   private static Staff staff= new Staff();
    private static Toolkit toolkit= Toolkit.getDefaultToolkit();
   private static Image image=toolkit.getImage("C:/Users/tim/Documents/NetBeansProjects/ISP/src/MusicGUI/icons/treble clef.jpg");
    private static Cursor noteCursor = toolkit.createCustomCursor(image,new Point(0,0),"Image");
   public Main (String m) {
        super(m);
        setJMenuBar(jmb);
        getContentPane().add(jtb,BorderLayout.SOUTH);
        panel.setLayout(new CardLayout(60,60));
        getContentPane().add(panel);
public static void main (String[]args){
        JFrame frame= new Main("Music");
        frame.setSize(800,400);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
        frame.setIconImage(image);
       Sorry for all the code. I'm desperate.
Thanks!

Oh my... have you been through the Swing tutorial?
Let's look at some of your code,
static class NoteSpace extends JPanel{
    public NoteSpace(){
    setPreferredSize(new Dimension(this.getWidth(),2));
static class LineSpace extends JPanel{
      public LineSpace(){
      setPreferredSize(new Dimension(this.getWidth(),1));
      public void paint(Graphics g) {
          super.paint(g);
          g.drawLine(0, (int) super.getHeight()/2, (int)super.getWidth(), (int)super.getHeight()/2);
}Here, NoteSpace and LineSpace are being set to a preferred size of 0x2 pixels, and 0x1 pixels respectfully. If you want them at 0 width, how do you expect them to show? In particular, NoteSpace isn't doing anything special. It's just a panel. Why an inner class? Lastly you should not override paint() for SWING. That's AWT stuff. For Swing, you override paintComponent(Graphics g) .
Then we have this
jbtcleff.addActionListener(new ActionListener (){
        public void actionPerformed (ActionEvent e){
            staff.setBounds(50,panel.getHeight()/2,panel.getWidth()-50,panel.getHeight()/2);
            panel.add(staff);
            staff.repaint();
        });I'm not sure what the variable jbtcleff is, but it seems you are adding your Staff panel to "panel" every time a button is pressed.... why? Why not just add it once (outside the action listener) and be done with it. Your panel object has a CardLayout, so I assume you meant to create a new+ staff panel everytime a button is pressed, and then add it to the card layout panel. Even so, setBounds(...) does not seem pertinant to this goal. (In fact, in most situtations the use of setBounds(...) is the antithesis of using layout managers).
The problem you mentioned though seems to be related to the use of a JPanel (your Staff class) that adds zero-width compontents to a grid array.

HAVE SOUND- FRONT PANEL DOESN'T WO

hmmm, okay. Last night I installed the "Beta" driver and the EAX driver. I now have sound but my front panel doesn;t work. For some reason XP doesn't see the panels devices properly and lists all of them on the panel board as UNKNOWN devices. Is there some other driver set I need to install the front panel?

Hello tonitpp:
Unfortunately, the "Run VI" method only executes the vi and it will not open the front panel.
If you want to open the front panel, use the "Open FP" method, which is also located on the same class.
I hope this helps.

Running executable files - which is the best way?

Is it best to operate three of the same re-entrant vi files from three independently running executable files or is it best to run all three of the same vi files from a single instance of labview?
I have a re-entrant vi that I created with NI Developer Suite 2006, V8.2. I saved that vi as three different named vi files for the purpose of creating an executable file from each of them. These executable files control three identical devices via three serial ports from a USB to serial port hub. The executable files are run simultaneously on one laptop and they do operate for the most part as expected. There is a concern about 1 possible IRQ conflict (best guess is that two of the three com ports might be using the same IRQ; com5, com6 and com7 are being used) because one of the three com ports didn't appear to be passing commands as expected like the other two ports did when I first started running the vi. I'm using a separate port monitoring program to view the transfer of commands to and from the device conected to the serial port to show me the command code being generated to the device and received from the device to validate the proper operation of the executable vi and to time stamp the transfers.
/BCU002
Hardware Engineer•Design Reliability/Performance and Validation Group•Wavecom, Inc. - Research Triangle Park, N.C.•http://www.wavecom.com

Megan,
Thanks for the reply! First I want to answer your questions. I do have three independent executables operating simultaneously and each one has been assigned it's own Com port. The text file is intended to time stamp the ADC reading every two hours. Each UUT has it's own file that documents the ADC value independently. I do this to validate the operability of the UUT during the test and doing so also shows me when the UUT fails to operate. However this problem that I'm havinig with the VI has been providing me with misleading results about the durability of the UUT and I can't figure out why it happens after 12 hours.
The UUT is working okay. I checked Friday it and reset the program and the power to it and it's been running ever since through the weekend. However the one problem that remains consistent is that after 12 hours the readings for the ADC, which is what I use to verify that the unit is transmitting RF into a dummy load while in factory test mode, just start showing up as 0 when they should be in the high 100's. One of the UUTs has an RF power meter connected to it's RF antenna and it's been working as expected when I start the test I have a software engineer running the exact same test on the same type of UUT using an entirely different software tool and it's not having any of these symtoms after running for days on end, uninterrupted. Unfortunately I can't use that software tool for my work because I can't control it with Labview...yet.
I'd be happy to email you a copy of the VI that I created directly if you think that you can look over it to see if there are any design problems that I need to repair.
I've attached a compressed file containing a bitmap of the control panels that I use during my test and I've included two NI spy files for you to see what's happening while my VIs are running and the 3 text files that recorded all of the ADC readings from the UUT over the weekend. I hope you have the time to look at them because can use the help.
/BCU002
Hardware Engineer•Design Reliability/Performance and Validation Group•Wavecom, Inc. - Research Triangle Park, N.C.•http://www.wavecom.com
Attachments:
FTM Control 123.zip ‏467 KB

Front panel doesn't show

Hi,
I have a vi (1) that calls a subvi (2) when I press a button. This subvi (2) calls the vi (1) again when I press another button. I have a event structure for this button (button of the subvi (2) ) where I set to false FP Open property for the vi (1) and then I call by reference this vi (1) and I do an invoke node (run) to show the front panel of it but it doesn't work. Why?
I post a image.
Thanks,
ToNi
Attachments:
blocks.JPG ‏41 KB

Hello tonitpp:
Unfortunately, the "Run VI" method only executes the vi and it will not open the front panel.
If you want to open the front panel, use the "Open FP" method, which is also located on the same class.
I hope this helps.

Problem about asynchronous call: subVI front panel doesn't pop up when called.

Dear All,
I'm new to LabVIEW, and this is the first time I try to use the asynchronous call.
I'm using LabVIEW 2011.
I want to build a directory for several VIs, and it should allow users to open more than one of the VIs at the same time by pushing the buttons. Before building this directory, I simply tried to use asynchronous call to call a VI form another VI, but found a big problem.
I followed the steps in the help file, created a strictly typed reference, set the option to x80 because I don't need the return. When I run it for the first time, it worked fine: the subVI popped up and run. Then I closed the subVI. But for the sencond time and on, when I run the caller VI, the subVI didn't pop up, instead it seemed to run silently on background because when I manually opened it from the file I found it running. Besides, I didn't find any option like "show front panel when called" of the asynchronous call.
The caller VI and subVI are attached. The address of subVI in caller VI should be changed accordingly.
What should I do to make it work properly? Thanks very much for any idea!
Solved!
Go to Solution.
Attachments:
asynchronous_call.vi ‏8 KB
boolean.vi ‏7 KB

Jeff·Þ·Bohrer wrote:
A better approach is to set the vi properties programaticly like this:
Jeff, you will be happy to know that I used this tactic in full force on a project recently (lots of dialogs in this program). Not sure how many LabVIEW reboots it has saved me from. Reuse VIs made it even easier to do.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

Front panel doesn't print

I am trying to print my VI. I can see the front panel in Print Preview. When it prints the front panel page is blank. Anybody else run into this problem and how did you fix it.
Thanks
Chris Gallo

Are you using any decorations on the front panel? Perhaps drawing a border around the panel?
(Reason I ask is that I once had a border decoration print over the controls it was supposed to be behind. I'm not sure what happened, since I could access the controls while running the VI, but for some reason, when I went to print, it thought it was in front of the controls. After selecting the border and sending it to the back again, it fixed the problem.)
Message Edited by Mythilt on 08-05-2008 10:00 AM
Jon D
Certified LabVIEW Developer.

My front panel doesn't show

Hi,
I have a vi (1) that calls a subvi (2) when I press a button. This subvi (2) calls the vi (1) again when I press another button. I have a event structure for this button (button of the subvi (2) ) where I set to false FP Open property for the vi (1) and then I call by reference this vi (1) and I do an invoke node (run) to show the front panel of it but it doesn't work. Why?
I post an image.
Thanks,
ToNi
Attachments:
blocks.JPG ‏41 KB

Hi ToNi
I attach you another 2 simple solutions. One with the FP.State property and the other using the close function of the vi reference.
The problem using the close function is, that the first vi doesn't open in running mode. Using the function "Open FP" the vi opens, but I can't run it.
This problem is avoidable using the FP.State property.
To run the vi's, vi1.vi and vi2.vi of the close directory must be copied to c: or you have to change the absolute paths in the vi's.
I hope this is what you are looking for and it helps.
Thomas
Using LV8.0
Don't be afraid to rate a good answer...
Attachments:
Hide.zip ‏35 KB

LV8.0 Auto-print front panel doesn't work

On the front panel in VI Properties/Print Options the 'Automatically print front panel every time VI completes execution' is cleared when you exit the VI Properties dialog and return to it. Consequently, you can't get the front panel to print by checking this option.
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Bshu,
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I'm having a problem with Front Row not working properly in OSX 10.5
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Running executable as a service, the front panel doesn't display properly upon the second logon.

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