Sharing a Global variable between two Labview applications

Hello,
A.exe and B.exe created by Labview 8.21. Both A.exe and B.exe run on the same PC. A and B exchanges data through a Global variable. Everything goes well if I launch both VI in Labview but when I try to launch the built executables A.exe and B.exe I get an error 1059. In B.exe I just use the Open Reference.vi icon to which I connect the path of the other application (A.exe) that already runs.
So the general question here is: how can I open a reference to labview application A from another labview application B, both running on the same computer.
Thanks for any hint,
Christophe

With a user ID# of 298, you have been using LV for quite a while.
Review the release notes for LV 8.0 LV 8.2 etc and you will see that that two different exe's run in different contexts.
I'd use a LV2 and VI server to read and write. VI Server will let you use TCP/IP to talk between the two contexts.
Ben
Message Edited by Ben on 01-15-2008 12:50 PM
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

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Sharing a shared network variable between two PC's connected to a network

Sharing a shared network variable between two PC's connected to a network
Surely this shouldn’t be so difficult! I have a little LabVIEW program running in the background of PC1. The exe’s task is to collect and send OPC variables held on a SCADA system and convert them to shared network variables (as I thought that they would be easy to share over a network, easier than the nasty OPC and DCOM issues). I have PC2 which runs measurement studio and I have created a nice test VB program which either writes or reads the network variables which are on PC1. The PC1 collection software is working perfectly and when I change the values on the SCADA system I can see the network variable change on ‘NI Distributed System Manager’. I When I look at ‘NI Distributed System Manager’ on PC2 I can’t see PC1 on the list and when I use the basic measurement studio code below to read the network variable it times out at the TestVariable.connect() line.
Ok so what do I need to do to read a shared network variable sat on PC1 from PC2 on the network
Public Class Form1
Private WithEvents TestVariable As NetworkVariableSubscriber(Of Double)
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
TestVariable = New NetworkVariableSubscriber(Of Double)("\\192.168.58.139\Test\TestVariable")
TestVariable.Connect()
End Sub
Private Sub TestVariable_Data_Updated(ByVal sender As System.Object, ByVal e As NationalInstruments.NetworkVariable.DataUpdatedEventArgs(Of Double)) Handles TestVariable.DataUpdated
TextBox1.Text = e.Data.GetValue
End Sub
End Class

Sorry lost all the formatting
Surely this shouldn’t be so difficult! I have a little
LabVIEW program running in the background of PC1. The exe’s task is to collect
and send OPC variables held on a SCADA system and convert them to shared
network variables (as I thought that they would be easy to share over a
network, easier than the nasty OPC and DCOM issues). I have PC2 which runs
measurement studio and I have created a nice test VB program which either
writes or reads the network variables which are on PC1. The PC1 collection
software is working perfectly and when I change the values on the SCADA system
I can see the network variable change on ‘NI Distributed System Manager’. I
When I look at ‘NI Distributed System Manager’ on PC2 I can’t see PC1 on the
list and when I use the basic measurement studio code below to read the network
variable it times out at the TestVariable.connect() line.
Ok so what do I need to do to read a shared network variable
sat on PC1 from PC2 on the network
Public Class Form1
Private
WithEvents TestVariable As NetworkVariableSubscriber(Of Double)
Private Sub Form1_Load(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles MyBase.Load
TestVariable = New NetworkVariableSubscriber(Of
Double)("\\192.168.58.139\Test\TestVariable")
TestVariable.Connect()
End Sub
Private Sub TestVariable_Data_Updated(ByVal sender As
System.Object, ByVal e As
NationalInstruments.NetworkVariable.DataUpdatedEventArgs(Of Double)) Handles
TestVariable.DataUpdated
TextBox1.Text = e.Data.GetValue
End Sub
End Class

Why did I have to enable Windows File Sharing to share files between two Mavericks iMacs?

File Sharing failed between my Mavericks iMacs. The console logs showed that the target iMac saw the ntlmv2 protocol as unknown to the kdc. I fixed it by enabling Windows File Sharing on the target Mavericks iMac. I had tried disabling SMB on both iMacs and leaving AFP on, but then nothing happened when I tried to connect. Why did I have to enable Windows File Sharing to share files between two Mavericks iMacs?

When you enable file sharing you need to have either SMB (Windows) or AFP (historically Apple-native) file sharing checked. The default in Mavericks is SMB, and not AFP.
If you uncheck both, then the system will turn off file sharing. Apple supports the use of both SMB and AFP connections in Mavericks, so with only AFP enabled you should have been able to establish a connection, but there could be a small bug or configuration-specific snafu that you're encountering.
With AFP enabled only, try pressing Command-K in the Finder to open the Connect To Server dialogue, and in here enter the address to the system using afp:// as the protocol, such as the following (the name can be looked up in the Sharing system preferences):
afp://my_imac.local

Shared and Global Variable Issue with Motor VI

Hello,
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When I added the potentiometer to the program, the cRIO-9073 chassis that I am using immediately crashes and looses connection with the computer when I click the Run VI button. I looked into this a little more and it seems that the chassis will crash only when I add shared and global variables to the VI. I think it has something to do with the Network Variable Engine; I don’t have it installed on the chassis because the motor program alone will not run if it is installed on the chassis. Also, I have the chassis configured to the RT setting and not the FPGA setting.
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Follow up to this post:
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How can I share Pin variable between two packages?

Hi every one,
Is there any one who knows how can I share Pin variable that it is defined with OwnerPin between two packages in java card( with eclipse 3.1),I studied Sharing Interface subject and I knows it teorical but I can not do it practical .
I can share primitive data type but I can not share Ownerpin.
If anybody has some sample codes or knows any link ,please inform me.
My code is same as below:
//In Server Side
package ginaPack;
import javacard.framework.*;
public class GinaApplet extends Applet implements GinaInterface{
OwnerPIN pin;
private GinaApplet (byte[] bArray,short bOffset,byte bLength) {
    pin =new OwnerPIN(PIN_TRY_LIMIT,MAX_PIN_SIZE);
          byte PinTemp[] = new byte[4];
          PinTemp[0] = (byte) 0x31;
          PinTemp[1] = (byte) 0x31;
          PinTemp[2] = (byte) 0x31;
          PinTemp[3] = (byte) 0x31;
          pin.update(PinTemp, (short) (0), (byte) PinTemp.length);
    public Shareable getShareableInterfaceObject(AID clientAID,byte parameter)
          return this;
    public OwnerPIN getPinShareable()
         return pin;
     public void process(APDU apdu)
                  //there are some codes in this here
}//Interface in Server side
public interface GinaInterface extends Shareable
      public OwnerPIN getPinShareable();
}//In Client side
import ginaPack.*;
public class UserCardApplet extends Applet {
private UserCardApplet(byte[] bArray, short bOffset, byte bLength) {
     //there are some codes in this here
public boolean select() {
          final byte[] Gina_AID={(byte)0x47,(byte)0x69,(byte)0x6e,(byte)0x61,(byte)0x41,(byte)0x70,(byte)0x70,(byte)0x6c,(byte)0x65,(byte)0x74};
          AID GinaAID = JCSystem.lookupAID( Gina_AID, ( short )0,( byte )Gina_AID.length );
          if ( GinaAID == null ) // probably not loaded on card
                    ISOException.throwIt( ISO7816.SW_FUNC_NOT_SUPPORTED );//6a 80
          GinaInterface ff = (GinaInterface) JCSystem.getAppletShareableInterfaceObject(GinaAID,(byte)0);
          if( ff == null )
               ISOException.throwIt((short)0x0903);
if ( ff.getPinShareable().getTriesRemaining()== 0 ) return false;
}My problem is in this line :
"if ( ff.getPinShareable().getTriesRemaining()== 0 ) return false; "when I select my applet this line throw an exception, ff.getPinshareable includes all of OwnerPin methods(such as getTriesRemaining ,check ,reset, update ,...)but all of them throw exception .
I think firewal does not allow other packages uses this methods .If my guess is right then what should I do for sharing the variables that they are defined with non primitive data type such as (OwnerPin,Signature,...)
I'd appriciated for any help.
yours sincerely,
Orchid.
Message was edited by:
NewOrchid

Applet 1:
package com.package1;
import javacard.framework.*;
public class Applet1 extends Applet {
    private static final byte tryLimit = (byte)3;
    private static byte[] pinBytes = {(byte)1, (byte)7, (byte)4, (byte)5, (byte)2};
    private Library1 lib;
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        lib= new Library1(tryLimit, (byte)pinBytes.length);
        lib.update(pinBytes, (short)0, (byte)pinBytes.length);
        register();
    public static void install(byte[] bArray, short bOffset, byte bLength) {
        new Applet1(bArray, bOffset, bLength);
    public void process(APDU apdu) {
        byte status=(byte)0;
        lib.resetAndUnblock();
        if (!(lib instanceof Shareable)) status += (byte)2;
        if (!(lib instanceof MyPIN)) status += (byte)4;
        ISOException.throwIt(Util.makeShort((byte)0x90, status)); // sw indicates tries remaining
    public Shareable getShareableInterfaceObject(AID cltAID, byte parm) {
        return lib;
}Library1:
package com.package1;
import javacard.framework.OwnerPIN;
import javacard.framework.PINException;
public class Library1 extends OwnerPIN implements Interface1{
    public Library1(byte tryLimit, byte maxPINSize) throws PINException {
        super(tryLimit, maxPINSize);
}Interface1:
package com.package1;
import javacard.framework.PIN;
import javacard.framework.Shareable;
public interface Interface1 extends Shareable {
    boolean check(byte[] pin, short offset, byte length);
    byte getTriesRemaining();
    boolean isValidated();
    void reset();
}Applet2:
package com.package2;
import javacard.framework.*;
import com.package1;
public class Applet2 extends Applet {
    private final static byte CLA_TEST = (byte)0x80;
    private final static byte INS_TEST = (byte)0x20;
    private final static byte P1_AUTHORIZE = (byte)0x00;
    private final static byte P1_DOIT = (byte)0x01;
    private final static byte P1_CHECK_SIO = (byte)0x0a;
    private Interface1 sio;
    protected Applet2(byte bArray[], short bOffset, byte bLength) {
        register();
    public static void install(byte[] bArray, short bOffset, byte bLength) {
        new Applet2(bArray, bOffset, bLength);
    public void process(APDU apdu) {
     byte[] buffer = apdu.getBuffer();
        if ((buffer[ISO7816.OFFSET_CLA] == CLA_TEST) ||
            (buffer[ISO7816.OFFSET_CLA] == ISO7816.CLA_ISO7816)) {
            short bytesReceived = apdu.setIncomingAndReceive();
            switch (buffer[ISO7816.OFFSET_INS]) {
            case ISO7816.INS_SELECT:
                if (!JCSystem.getAID().equals(buffer, ISO7816.OFFSET_CDATA, buffer[ISO7816.OFFSET_LC]))
                    ISOException.throwIt(ISO7816.SW_APPLET_SELECT_FAILED);
                sio = (Library1)JCSystem.getAppletShareableInterfaceObject(JCSystem.lookupAID(<fill in parameters>);
                if (sio == null)
                    ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
                break;
            case INS_TEST:
                switch (buffer[ISO7816.OFFSET_P1]) {
                case P1_AUTHORIZE:
                    if (!sio.isValidated()) {
                        if(!sio.check(buffer, ISO7816.OFFSET_CDATA, buffer[ISO7816.OFFSET_LC]))
                            ISOException.throwIt(Util.makeShort((byte)0x9A, sio.getTriesRemaining()));
                    break;
                case P1_DOIT:
                    if (!sio.isValidated())
                        ISOException.throwIt(ISO7816.SW_SECURITY_STATUS_NOT_SATISFIED);
                    sio.reset();
                    ISOException.throwIt(Util.makeShort((byte)0x9A, sio.getTriesRemaining()));
                    break;
                default:
                    ISOException.throwIt(ISO7816.SW_INCORRECT_P1P2);
                break;
            default:
                ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
        else {
            ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);
}1. Upload package1
2. Install Applet1
3. Select Applet1
4. Upload package2
5. Install Applet2
6. Select Applet2

Sharing One iPhoto Database Between Two Accounts

Below is a reply to a question I have regarding sharing photos with my wife on the same Mac. I would like for us both to able to upload, edit, and use photos from the same iPhoto database. Do all of the buggaboos listed in the reply below still apply?
Thanks,
Jim
Re: Sharing Photo's on the same iMac between two user accounts
Posted: Jun 2, 2009 8:27 AM in response to: Thomas Harrigan Solved
Tom
For iPhoto 09 (version 8.0.2) and later:
What you mean by 'share'.
If you want the other user to be able to see the pics, but not add to, change or alter your library, then enable Sharing in your iPhoto (Preferences -> Sharing), leave iPhoto running and use Fast User Switching to open the other account. In that account, enable 'Look For Shared Libraries'. Your Library will appear in the other source pane.
Any user can drag a pic from the Shared Library to their own in the iPhoto Window.
Remember iPhoto must be running in both accounts for this to work.
If you want the other user to have the same access to the library as you: to be able to add, edit, organise, keyword etc.
Quit iPhoto in both accounts. Move the Library to the Users / Shared Folder
(You can also use an external HD set to ignore permissions, a Disk Image or even partition your Hard Disk.)
In each account in turn: Double click on the Library to open it. (You may be asked to repair the Library Permissions.) From that point on, this will be the default library location. Both accounts will have full access to the library, in fact, both accounts will 'own' it.
However, there is a catch with this system and it is a significant one. iPhoto is not a multi-user app., it does not have the code to negotiate two users simultaneously writing to the database, and trying will cause db corruption. So only one user at a time, and back up, back up back up.
Regards
TD

No. All the folks who post here are just Users, like you.
Regards
TD

Sharing external FireWire drive between two Mac Pros

I know that sharing an external FireWire drive between two machines (i.e. both connected at the same time) is a very bad things as both will assume that they have exclusive write access to the drive and quite quickly write over what the other machine has just written.
Would it be possible though to mount the drive as read-only on the first machine and in read-write mode on the second? Would this preserve integrity as the second machine would in fact have exclusive write access or would other problems arise?
Thanks for any responses to a stupid question!
Peter

Mmm, Connect the drive to the private secure network Mac. Connect the two Macs by FireWire and create a network over the firewire connection, configure it to use class C addresses, ie. 169.x.x.x manually and then share the firewire drive to the other Mac (also on a class C network address over firewire).
Both macs will still have their own ethernet network addresses and each network will not be visible from the "other" network (unless you choose to share your internet connection over firewire).
The only caveat here is that the firewire drive will be visible to every other Mac on the secure network that you allow to connect to it (which is why I chose that one, rather than the public Mac). Or can you restrict sharing to only one network ..... didn't think so.

Sharing one "Email account" between two Windows "user account" in a "Global Inbox"

Context: Two "windows user accounts" on a Windows XP PC, having the same email address. The "Local folder" is placed on a "All users" directory and acounts settings specify a POP server with a retention period of 30 days.
Problem: When User B ask for reception of messages, he received all messages already read by user B. (this probably due to separate popstate.dat).
On a previous PC two years ago, we do not had this dupplicate reading.
If you have a solution, could you also cover the Windows 7 case.
Regards
Dto75

I strongly suggest you get the whole profile in the same folder hierarchy before you even consider moving to windows 7.
Windows XP has Program File
Windows 7 has Program Files and Program Files (X86) your executable goes in the x86 one.
XP has applications data
Windows 7 has appdata
In windows XP Thunderbird's profile is in application data in windows 7 it is in appdata/roaming
If you open explorer the old locations appear to be there, but they will not work to locate Thunderbird's disparate parts of it's profile
And so the list goes on. Hence none of the locations you know will probably exist under windows 7 so if parts of the profile are pointing to locations that have changed, only grief awaits you.

Sharing one music library between two users on a mac

I want to set my wife up as a separate user on my mac and share my music file with her so we no longer mix up our iPhone apps. I don't want a second copy on my hard drive. I've tried one method on here HT1203 but it makes a second copy and fills up my hard drive. I do not want to share the whole media library just the music. There must be an easy way to use two iPhones with separate user ids on one Mac so we don't mix up our apps. I would have though that the great Apple would have just sorted this out when you plug in a different device.

First, back up your computer in case it does things you don't like. I'm not testing this on my computer.
You'll have to deactivate iTunes managing your music (deselect in preferences having iTunes organize your music and copying it to your media folder when adding to iTunes). Do the same for iTunes in her account.
Go to your iTunes folder and drag the music folder in Media to the Shared Users folder at the top level of the drive. You may also need to get info on the music folder and change permissions on it and all enclosing items so she has permission to use it too.
It is just possible your copies of iTunes may track all the moves. It would be good if it does. I know I have manage music disabled on my computer and iTunes is good at tracking when I move things around in Finder, unlike when iTunes is totally terrible at tracking when you let it manage music. If it doesn't track then you may have to face rebuilding your libraries using the music in the new location.
You will have to come to an agreement in deleting music. Fortunately in the manually manage mode you are using if you delete a track in your iTunes it will not delete the actual file. You have to manually delete it in Finder which is good because she may still be using the file.
If one of you renames the file, it will affect both. Haven't tried this but in theory you would each retain your individual ratings and last played.
Let us know if it works.
Edit: Found this; compare with my concept piece above:
iTunes: How to share music between different accounts on a single computer - http://support.apple.com/kb/HT1203 - relocating iTunes' media folder to a shared area but leaving separate library files - extra tip at https://discussions.apple.com/message/17331189

Troublie with File Sharing and Other Activities between two Macs

Here's my situation. I have two Macs... a MacBook Pro and a Mac Pro, both running OS X 10.5.7. They connect to the Internet wirelessly through an Apple Airport Extreme (N) Base Station. But I also have them connected to each other via Ethernet. AppleTalk is turned on, only on the Ethernet connection.
My problem is that I want to curtail all computer-to-computer communications (file sharing, Airfoil speaker connections for playing iTunes, Chronosync file synchronization, etc.) so that they ONLY occur over the Ethernet connection.
I have both computers setup so that "Ethernet" is first in the sort order for network connections. File Sharing is turned on on both computers.
But... I can tell that, sometimes, the connection between the two computers is occurring over the WiFi instead of through the Ethernet (for instance, I disconnect from the WiFi on the Mac Pro and the music playing through AirFoil stops... or Chronosync can't connect to the laptop to perform a sync).
Am I just up a creek? Or is there some way to ensure that the two computers only "see" each other over the Ethernet connection and not over the shared WiFi? I know that, with "N" speeds on the Airport Extreme (and with N-capable cards in both computers), the "speed" thing isn't that big of a deal. But when running a Chronosync synchronization where several GBs of shared files are being synched, it still puts a crimp in Internet browsing speeds, etc., if that data is going over the WiFi instead of the Ethernet.
Thanks!

Hi,
I'm not certain of this but whilst you're waiting for a more informed response here goes. OSX uses something called the "default route" which prefers the one with internet access over the order of networks you set in preferences, therefore, the default route isn't necessarily the fastest route. Without editing configuration files or using hardware or software to hard code routing routines, you'll need to switch off Airport and hence the default route will become the network created automatically by your ethernet connected Macs. Apple Talk isn't necessary.
This thread may be of interest to you:
http://discussions.apple.com/thread.jspa?threadID=2039622&tstart=0

Home Sharing - Can you share between two accounts on the same computer?

I haven't been able to find any info about this, but does home sharing allow you to share files between to different user accounts on the same computer? I have been struggling with trying to do this for years, and I'm really hoping this solves my problem.

This is true in a sense; you have to use the same itunes account to activate home sharing. BUT, you don't need to use the same itunes account for general use.
Example:
My computer and iPhone has one itunes account.
My wife's computer and iPhone have a totally separate account.
I turned on Home Sharing on both machines using one account name and ID - mine.
Now she can see and copy my music and apps, etc. I can see and copy her music, apps, etc.
However, when she goes to the iTunes store, she still can buy and so forth *on her own account*. Same with her iPhone. And I can still do the same as well on my own account on my machine and phone.
The only limitation seems to be updating apps: If you copy apps over to another machine using Home Sharing and install them on another phone running another account, it works great. But you can't seem to update those copied apps, unless you log in on the phone or the computer it syncs up to with the account it came from.
Aside from that, the apps still work even when the computer it was copied to and the phone it was synced to are active on ANOTHER account.
The key is the setup - for Home Sharing. That needs to be one account, but otherwise it's business as usual.
Message was edited by: controller2k

File sharing doesn't work between two computers

I have a Macbook Air bought late 2009 (I'll call it MBA 1). OS 10.6.0.
I have a new Macbook Air bought a few days ago (I'll call it MBA 2). OS 10.6.4.
I have been attempting to share files from the two computers.
I was able to move files from MBA 1 to MBA 2 without too much fuss. I could do it both ways: by finding "Shared" in Finder and then accessing the files or I could go to "Go" and "Connect to Server". I was able to add the username of the MBA 2 to the list of users in the Sharing pane of the MBA 1.
So going from MBA 1 ---> MBA 2 is fine.
However going from MBA 2 ----> MBA 1 doesn't work.
1) The finder in the MBA 1 doesn't show "Shared".
2) I can't add user to the Sharing pane of the MBA 2.
The problem could be that the two usernames of the MBA 1 and the MBA 2 are very similar.
Username of MBA 1: jk
Username of MBA 2: J K
I tested this theory out by adding a username I just made up called "Jack" and it added the username fine to the list of users.
But it's too late to change the username of the computers now.
What can I do?

I got it to work.
What I did was on MBA 2, I went to "Go" and "Connect to server". Then I selected the MBA 1 to connect to.
As soon as I did that, "Shared" appeared in Finder with the MBA 2's name on it.
After connecting which took a long time, the folders to be shared showed up in the Finder window.
I don't know why trying to connect to MBA 2's server didn't work in MBA 1. I went to "Go" and "Connect to server" many times on the MBA 1 but it didn't work.

ITunes locks up when Home Sharing is turned on between two macs

Ok normally On these discussions people ask a question hoping for the answer to fix their problem. Well I'm going to post a question and give the answer all in one post since I figured out.
When I would open up iTunes on my second mac hoping to share or import some music itunes would lock up that computer. When Home Sharing was turned off on both computers iTunes would work fine on either machine. This really baffled me until I remembered I recently change my Apple ID password. While I had changed it on one computer I hadn't changed it on the other. When I changed the password on both machines vola, Home Sharing worked without locking up the computer.

the computers firewall needs to be set not to block it
the wifi router needs to allow the ports required for the various apple services
you can find out which ports here
Well known TCP and UDP ports used by Apple software products

Sharing a hard drive between two Macs with Time Machine

can I use the same hard drive to back up two different Macs with Time machine? I'm ok with hot swapping the cables.
Message was edited by: Brian Monson

Brian Monson wrote:
can I use the same hard drive to back up two different Macs with Time machine? I'm ok with hot swapping the cables.
Yes, but TM, Leopard and external drives are not OK with hot-swapping. Never unplug a drive without properly ejecting it first.
Each computer will have it's own backup folder on the drive and each computer will recognize its own backup folder. There is no limit other than HD space on how many computers can be backed up on an external drive.

Variables between two swfs

I have a main.swf (level0)and a news.swf (level1). News.swf
is loaded because main.swf tells it so :-). If I have a variable in
news.swf, does it become part of the main.swf? I want to send a
variable from news.swf to main.swf, so the main.swf knows which swf
must load after event in news.swf. Which is the best way to do
that? Is it a LocalConncetion?
THX for advice

rohai wrote:
> I have a main.swf (level0)and a news.swf (level1).
News.swf is loaded because
> main.swf tells it so :-). If I have a variable in
news.swf, does it become part
> of the main.swf?
Not it does not becomes part of the main.swf but there is no
problem to access
the variables across multiple levels tho. _level1.vars=value;
or _level0.vars=value;
Best Regards
Urami
<urami>
If you want to mail me - DO NOT LAUGH AT MY ADDRESS
</urami>

Sharing a Global variable between two Labview applicatio​ns

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Sharing a Global variable between two Labview applications