Replacement of a URL with a Global Variable - syntax error

Similar Questions

• static reference with the global variable

  Hi, I used a static reference to a Subvi where I change a global variable before (3-4 years ago) and do not remember how I did it.

  It was something like these attachments, but now I'm using LabView 2013 instead of LV 8.6.

  The change in the overall operating system sees only not in the main vi (looks like the invoke node run vi does not work with globals).

  In addition the vi close with the invoke node close vi but not if I put the custom in the Subvi properties to automatically close.

  dkfire wrote:

  Why not call the sub vi as usual, just with the setting to display the front panel, when it is called?

  Use the connector pane to transfer the value of the sub vi Ok button when done.

  That's what I recommend.  If this is not possible for some reason, then you will need to use a flat Structure of the sequence to force the reading of the global variable after the Subvi is complete.

• formula with the global variable node

  Hello

  I'm tring using node formula with global variables as an entry and exit.

  but this is where I see the SW hangs forever.

  Either way, I am a novice to the labview.

  Can some give me advice why this is happening?

  Thank you in advance,

  Do

  As smercurio mentioned, if you described what you wanted to do, we could show you things that can be done using LabVIEW.

  For example, loops For may not be not necessary if you are trying to extract or manipulate data in tables.

  It is good that you have a job, but it would be better to learn the power behind LabVIEW.  Who knows, you can actually walk away from C code...

• With the help of semaphore with a Global Variable - correct use?

  Hi all

  I looked in the use of global variables and in my case, it seemed with the help of a semaphore is the appropriate solution.

  In my case, I use a global variable to store the State of the system. Asynchronous two with screw environment (same VI) will follow two COM ports to see if they get a ' login:' command prompt. If the COM port is associated with Alpha, Charlie, or Echo, it increments by 1, and if it is associated with the Bravo, Delta, or Foxtrot, is incremented by 2 GV. If the GV is 3, the rest of the code will run. In this case, it must be a port COM A, C or E; the other should be B, D or F.

  A VI parent is called inside a loop. He works for the first loop. He never adds up to 3 on the second loop, however. I can't understand why. Please let me know if my code is a poor use of semaphores, or if there is debugging I can try.

  I'm still relatively new to LV, so I'm sorry if my screws are difficult to read. I created this in LV2011.

  Thanks for any help!

  CelerityEDS wrote:

  The output of my time looping (wait GV = 3) goes to the structure of the case on the bottom right (clear SGS, PasswordEntry, etc.), so the GV get indeed consulted by the upper case structure right.

  ??

  Your right upper case structure does not run until your time ends in a loop.  The while loop does not stop until the total is equal to 3.  Where can increment you the world besides structures case you cannot yet?

  Have you tried in your point culminating execution of the VI in order to see how they are actually running?

  Another problem that I see.  Assuming that your first while the loop is going to end.  In the structures of your case, you lock the semaphore.  But you can never unlock the semaphore unless you have the right combination of conditions that allow you to get to the case that unlocks the semaphore.  The conditions are based on data that are read before the start of the case of structure, which means that data will not be read and changed until it all ends.  You have the timeout of your lock semaphore connected on one of the cases, but your semaphore lock can never timeout because you do not have a value on his entry time-out.  I think you have a situation where you can lock a semaphore, then arrive at a situation where you can not unlock, then wind locking up of your cold code.

  I don't really think that you need a semaphore at all.  I think you can protect reading and writing functional your overall using a global variable, i.e. the motor action.  Overall, I think you need to rethink the architecture of your code.

• How to associate existing global variables

  It's probably something stupid that I'm missing.

  I created a global variable and there is a string.  I put it in a file called XML_Global.vi I then proceeded to make an another global var and would assign to the same variable.  However, the IDE shows me an another façade Globals 4.  How can I associate the existing façade of XML_Global.vi with the global variable I PLOPPED down there?  I looked everywhere on how to proceed in the properties and others, but couldn't find it.

  Have you read through this document?

  http://zone.NI.com/reference/en-XX/help/371361F-01/lvhowto/creating_global_variables/

  There may be some confusion about what is happening... When I add a global variable for the rough process, I followed the block diagram is:

  • Open the front panel to the global variable
  • Add FP (there may be several elements in a global variable VI)
  • Save the global variable VI
  • Then drag + drop of my project on a diagram VI
  • Select the variable I want by double clicking on the overall and will select an element > name Variable

  If this clears it for you? Looks like you try to simply place another instance of global variable in the palette of functions and then select the variable to assign this instance to (similar to what you would do with a local variable)? With globals, a new instance of a global VI is created when you drop the global BD... you want to place the world you have edited/saved (drag + drop of project or use the "Select" VI in the range of functions).

  I hope this helps...

• Why LabVIEW example projects using Global Variables?

  I'm puzzled.  I've been pretty good programmers LabVIEW talks (including some who work for the OR) and came away with the impression that Global Variables should, as a general rule, be avoided, with functional Global Variables (alias VI Globals) generally preferred for "local memory".

  I have studied some of the example distributed with LabVIEW, 2012 and 2013, in particular the proposed acquisition in real time and am struck by the use of Global Variables, where I'd be inclined to use instead a FGV.  For examples, to stop all the loops on the RT target, the overall "All the RT loop Stop" is defined; 'Constants' of configuration (such as timeouts, Streme network names, the names of the journal folder) are kept as Globals; Streme network endpoints are stored in Globals.

  [Note - there is a weird spelling of the second word of the network Streme, above - when I tried to post with the correct spelling, I got an error message saying this word is 'not allowed in this community".]  I apologize for the offense, but I must confess that I do not understand what the problem with the help of the spelling of this word...]

  Why use Globals in these cases, rather than write a bunch of VIGs to hold these data?  Note that almost all these Globals are 'Read' essentially (written once when a resource is acquired, for example) or "Read Only" (treated as if they were a constant).  Indeed, read-only variables can be written as a Subvi with only an output terminal, acting as a (visible, due to the icon) constant.

  I can see advantages to this approach.  On the one hand, VIGs can have error bounds who run the data flow (I just spotted a bug "data flow" in code, I am developing that is based on this model, to read configuration data to an XML file in a world and in the same VI, Global wiring to a "use - me" terminal, but with no guarantee that I'll read the overall after I write it).

  It is, I suppose, a matter of 'speed' - perhaps Global Variables are 'faster' than VIGs (especially if the VIG 'sits' on an error line).  My thought, however, is that this difference is likely to be trivial, especially as these VIGs (or Globals) tend to become "occasional" calls (with the exception of the indicator 'all the loop Stop' which is called once per line).

  Are there other arguments or considerations that make a Variable global to a better choice than a VIG?  Is there a reason that LabVIEW developers put in these start-up of projects LabVIEW?

  BS

  I have to ask, how do you use functional Global Variables?  Like just a Get and Set?  If so, you can use a global variable.

  Yes, globals are faster and use much less overhead.  At the summits of CLA in recent years, we talked about using globals.  The most common use is for Write-Once-Read Many and writing-never-Read Many with configuration data.  It's a good idea to use globals with the constants that can change on you.  It turns out that the world will have the same performance as a constant in this case.  This is done so that you don't have 1 place to edit the 'constant '.

  The rule on "Globals are evil" actually goes back several years when NEITHER had the huge "people of the country are bad" vendata.  But NEITHER explains well how to do things properly.  So I found people, instead of using local variables, using the value property node.  It's even worse because the property causes thread swaps and kills your performance.  It wasn't until I shouted to people to use wires and shift registers I have seen improvements in the way in which people wrote their code.  So people are always riffling in the use of globals and decided to use FGVs with the EEG and fixed rather cases.  But this does not solve the problem of the conditions of race with critical data and you cause an additional burden.

  So from my experience, I use globals all the time for configuration data.  Yes, you must be careful about the race conditions.  But as long as you understand that it is a common and useful practice.

  I would not use a global variable for data that are constantly changing (use registers to offset or Action motor) and/or processes that have critical sections of code (use a motor of Action).

  NOTE: I use the definition of Mercer to FGV (a Get/Set only) and motor Action (many cases which specifically affect the data).

• Is it possible to replace occurrences of a global variable massively while also setting up the components of connector?

  I work through some of my old code now, looking to increase the performance where I can. Here's my situation:

  1. I used Global Variables to spread a few constants in my screws, instead of a proper typedefed cluster.

  2. execution does not have an extension, but no matter when I save the project, I would say 50 to 60 percent of the economy/compling time is spent on the screw of 300 or more with global variables. I suspect it has to do with the link between the overhead associated with the global.

  3. Ideally, I would like to replace this:

  

  With something like this:

  

  While also putting the connector of this pane:

  

  To do this:

  

  What is the VI server is capable of? You can assume that the VI in question have very predictable names, matching the regular expression:

  subname[0-9]^3
  

  Is it still worth it to replace?

  I don't know what you mean by compile time.  One of my big projects LabVIEW RT, which has about a thousand of screws, a lot of VIGs (FGVs), engines of the Action, even a few Globals and variable shared.  In my case, the thing that seems to "slow down" the compilation the most is the links to the report generation tool (I use Excel workbooks for 'drive' of experience and also save the data a bit).  If I do a building together, to build this routine and about 6 'support' routines (data analysis, utility Configuration, etc.), it may take a minute, but I can't find this excessive nor a charge (compared to the facility to isolate/encapsulate features in screws as FGVs).  So I guess I don't understand the "real problem"...

  Bob Schor

• $global: variable defaultVIServer gets replaced by data warehouses in PowerCLI 6.0 Release 2

  I recently noticed a strange behavior with the variables global:defaultVIServer(s) of $.

  The content has been change in the middle of my script. especially after sub $global: defaultVIServer.Name

  10.10.10.10 for 10.10.10.10@443

  For some reason any port number was getting stuck at the end of the name field, which failed in the cmdlet Test-connection (ping).

  After some research, I went down to my use of the global variable of VMware, vmstores

  The following line replaces $global: defaultVIServer

  $dsList = (dir-path vmstores :)

  Code snippet

  to connect-VIServer $vctIP

  Global $: defaultVIServer | FL

  $dsList = (dir-path vmstores :)

  Global $: defaultVIServer | FL

  $dsList | FL

  
  

  You can see that $global: defaultVIServer gets replaced by the data of $dsList after the dir command

  Screenshots are attached.

  
  

  At least, I have to unplug my server and reconnect to solve this problem.

  
  

  Is there a better way to get the list of warehouses of data (and their paths) with PowerCLI 6.0?
  

  Maureen

  I only call this command in one place in my scripts, so I tested for a '@' char in the $global: variable DefaultViServer after this call and if I find it then I disconnect and reconnect to my servers.  This version fixes the global variable, which I use in other places in my scripts.

  I didn't change my scripts having to use the other variable, $global: DefaultVIServer.ServiceUri.Host,.

  because it would have been a little more difficult.

  In addition, when the bug fix is implemented, I won't change my scripts.

  Extracted from:

  foreach ($server in $global: DefaultViServers)

  {

  # check if @ tank is in the name; i.e. @port_number

  If ($server. Name - match ' @')

  {

  # split the name IP address and port number

  $serverNameList = $server. Name.Split('@')

  Disconnect $serverNameList VIServer [0]

  sleep - 1 seconds

  SE $serverNameList connect-VIServer [0]

  }

  }

• Functional global variables with polymorphic VI

  Hello

  I am keen to build a functional global variable in a polymorphic VI. So, for example in a functional global variable, we have case structure. I want to build separate VI for the structure of the case and make a polymorphic VI.

  Is it possible that I could use a polymorphic VI rather than business structures?

  Thank you!

  You could create a polymorphic VI that serves as a wrapper for the FGV.  The idea is that each instance of the polymorphic VI called FGV with selected appropriate case-sensitive.  Then your API is the polymorphic VI instead of FGV.

• Digital control system, using limits of entry of data with global variables

  Hello!

  I have a Subvi with several digital control sliders. These control framerate, the pixel clock and exposure of a camera and their change in max/min/increment whenever one of them is changed - they are interdependent and get their information from the camera continuously during execution.

  I'm trying to remote control this VI, but during the passage of a value using global variables, it doesn't "stick".

  Example:

  The value for exposure is 237,48 Ms. different values are constrained to the nearest value. So if I pick 240,00 ms at the Subvi, he should know that this is not a valid value and change to Mrs. 237,48.

  But it is not do and I don't know why. When I enter the values manually, it works fine.

  Any suggestions?

  The limits on the controls that apply when their control from the front and is not passing values via the connector pane.

  You should use something like "line and force" within the VI to validate the values are within the range (maybe constrain data or return an error).

• Global variable to capture the username with Form 6i

  Hello world
  I have a menu created with Forms 6i and the shortcut that I use to call the menu in its target the following: C:\orant\BIN\ifrun60. EXE userid = name of user and password MYFORM. FMX
  When I remove the user name and password of the target of the shortcut he asks me the user name and password so when I typed, I am authorized to enter the application, but I want to be able to store the username on a global variable and set the value on an item when the user selects the program that he or she wants to use , so they're not going to see the other users information.
  Can someone please help me to do this step by step?
  
  Thanks in advance!

  Try: SOULEYMANE. VARIABLE: = USER;

  The USER is a function that returns the user name, as SYSDATE returns the date.

• Screenshot URL WITH the VARIABLES for re-use?

  Hello
  
  I have an application that authenticates users only if a page is requested. Once they log in, I want to send them back to the page, they came, that required that they connect.
  
  BUT, I need to return to this page with a few variables URLS intact (pageID, sometimes another, it varies from one page to the next).
  
  I can't for the life of find me a way... to have messed with GetTemplatePath and others, looked at my book of Forta, have searched here and google... it seems like it should be easy, but I can't understand how to recover what I need.
  
  Help?
  
  Thanks in advance...
  
  Liz
  

  try cgi.query_string.

• Errors with Global Variables

  For those of you who use global variables in your projects, is there anyone who has encountered the following error, probably after renaming a project?
  
  "ERROR: Variable (the variable name is shown here in parentheses) is not defined."
  
  For each version of the software, I simply rename the project to the new version... e. g, 2.1, 2.2. In point 2.2, I noticed the error above on several pages (had started using a 7 HR with this project). I contacted the HR technical support and they said that something was wrong in my project. I went on the task to access all pages where errors were located, typed a character, deleted, and that fixed the problem. After everything has been fixed, then I renamed the project 2.3 and all of a sudden, I get errors once AGAIN and they are not yet on the same pages as before! I don't know what is happening, but I don't want to waste time every time I have rename the project of a new version.
  
  Any ideas anyone? Is there a better way to make versions than what I'm doing?

  OK, after that I corrected all the errors and renamed my project again, no problem has resurfaced. This leads me to believe that something has happened to the files when a developer and I were moving files in Visual SourceSafe, and I was checking stuff in one place, check in another another location, etc.. By doing all this, something must have happened to the global variables on 116 my 400 + help pages. At least if all goes well it's fixed for good now, because we won't have to move the files, and I always check in/out at the location, new.

• How to extract file with LabVIEW Teststand global variables

  Hello

  My goal here is to extract all the contents of the global variables for file (names and the value of any types) in a sequence of my LabVIEW UI file.

  For now, I can only open a file of sequence of LabVIEW and get the number and the names of the variables (cf. vi) attached.

  But if my variable is a container, I would like to know all the contents of this container (and so on) and I don't know how to do it.

  In addition, I have to extract the value of variables that I don't know the type in advance...

  Can you help me?

  Thank you.

  Well I finally used the method "GetNthSubProperty" to work on each variable and I use the property 'Type' to know if it's a number, string, boolean, or a container. If it is a container, I repeat the process at a lower level... (see attached vi)

• If... Else if statements with global variables

  Hi people!

  I have a picture of a stove that I want to pass on the right sliding just behind the scene and swipe left left off the stage.

  The stove, at the beginning, is at the center of the stage.

  So, I have created 3 intial global variables (I ' ve introduced in the right position in... edgeAction.JS as described in this topic):

  Var Center = true;

  var left = false;

  var right = false;

  And in the stage-> Composition ready, I created 2 functions related to the SwipeRight and SwipeLeft events. I used if... If... statemens to check what position my photo's.

  swipeRight = function() {}

  If (on the left)

  {

  sym.playReverse (1000);

  Var Center = true;

  var left = false;

  var right = false;

  }

  ElseIf (Center)

  {

  SYM. Play ("Right");

  var right = true;

  var left = false;

  Centre var = false;

  }

  else {}

  SYM. Stop();

  }

  }

  swipeLeft = function() {}

  If (in the Center)

  {

  SYM. Play ("left");

  var left = true;

  var right = false;

  Centre var = false;

  }

  ElseIf (right)

  {

  sym.playReverse (3000);

  Var Center = true;

  var left = false;

  var right = false;

  }

  }

  I think I did everything correct, but it does not work!

  Any suggestion?

  You can find the Web release and the project herefile.

  Thank you VERY MUCH in advance for your help!

  Davide

  I think that your statement of global variable is correct, but when you reset the values of the variables by using the var keyword, you are in a different scope.

  So, instead of this:

  swipeRight = function() {}

  If (on the left)

  {

  sym.playReverse (1000);

  Var Center = true;

  var left = false;

  var right = false;

  }

  ...

  Try this:

  swipeRight = function() {}

  If (on the left)

  {

  sym.playReverse (1000);

  Center = true;

  left = false;

  right = false;

  }

  ...

  HTH,

  Joe