Call in reference to replacement VI

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• Data transmission between screws using call of reference without actually executing the vi

  Hi, I was wondering if you can pass data between the screws by using call of reference without actually executing the vi (ie: not having the façade appears during execution). Is this possible?

  While I'm here I might ask as well on the transmission of data between the screws I'm trying to pass a flag to a vi value to another. Because of the way the program is setup, I can't wire this value directly. Y at - it another (fast/efficient) way to pass data between two screws during execution (other than shared variables). For what it's worth this application will be built into an executable file, so data transiting will have to work for it as well.

  Thank you

  Vlad

  Vlad P wrote:

  While I'm here I might ask as well on the transmission of data between the screws I'm trying to pass a flag to a vi value to another. Because of the way the program is setup, I can't wire this value directly. Y at - it another (fast/efficient) way to pass data between two screws during execution (other than shared variables). For what it's worth this application will be built into an executable file, so data transiting will have to work for it as well.

  You have the choice:

  • shared variables (as you mentioned)
  
  
  • global variables
  
  
  • queues
  
  
  • notifiers
  
  
  • control references and properties of the value
  
  
  • action motors
  
  
  • ...

  Tell us a little more about your applications. What should do?

• Threading and reuse of the node to call using reference of buffers (of the required adhesive tape)

  I tried to get the following information in the public domain for years and now that I have the answers, I'll share with those who might be interested.

  Caveat!

  Wrap your head in tape before reading just for the sake of security.

  My two questions were;

  (1) may LV re - use tampons of VI calling when you use VI serve call by reference?

  (2) is used when the use of call by reference UI thread?

  

  1 when you call a VI using the call through the reference node, the data in the pane of the copied or is node connector - this online as it would be with a Subvi properly implemented?

  Short answer: it's somewhere between the two.

  Long answer:

  The compiler does not know what will be called VI, but there a hint:

  the reference connected to the node of the call by reference. He uses to get the 'Prototype' for the call. Therefore, for optimal performance, use a prototype that has the same 'characteristics placeness' as it is called VI. That said, users don't know what are the "characteristics of the placeness.

  Before getting into the details, I will say that the overhead of these copies should not matter much unless it's a large data structure (a table with lots of items.) or a cluster/class with many fields or containing large networks etc..

  Example 1:

  If the prototype does not change the data, then the compiler assumes that the crux of the call by reference will not alter the data. However, at runtime, a check is made to see if the real called VI will modify the data. If Yes, then a copy is made and past so that the original data can be modified.

  Example 2:

  If the prototype contains an entry that is wired through an exit so that both input and output terminals can use the same buffer memory, but running an audit determines that the real called entry and exit VI do not share a buffer, then a copy will be made from output of the actual call to the original screws (combined input and output) buffer.

  I should also mention that, even with this behavior "are trying to get along with the prototype", it is not always possible to obtain good performance as a Subvi ordinary call. For example, if you have a situation where the prototype does not change the data and passes it through to an exit and then the compiler must assume that the data is changed (because, as in example 2, there are screws that may change even if the called real VI is not).

  And there are a few caveats:

  (1) this behavior "using a prototype" was new for 2009. Before that, we used a method more naïve data of passage that took all the entries will be changed and no outputs don't share a buffer with an entry.

  (2) this behavior can be changed in future versions, if we find additional optimizations.

  (3) this behavior is the same that we use for the dynamic distribution live (when you use the classes in LV)

  (4) If you want to create a VI can be used as a prototype, you can use the features of the Structure in Place to control the "characteristics of the placeness', namely the element nodes in and out of the border, the function"Mark as modifier"border nodes (note the pencil icon on the item), and the node always one copy.

  (5) the prototype is only the first reference ever connected to the node of the call by reference. So if you make a new prototype VI, you can just make a reference out of it plug into the crux of the call by reference. I suggest to remove the node from the call by reference and file a new.

  (6) for remote calls, we still "making copies" by transmitting data over a network.

  I hope that this helps, if you want information/clarification, so feel free to ask.

  2 - is the call made by the reference to run in the user interface thread node? If the call is made by a remote machine via ethernet, thread that host (the computer that makes the call by reference) runs on and thread that executes the target (the machine that contains the file VI) on?

  In the case of premises, the appeal made by the reference node does not require the user interface thread and may work in some thread the VI wants to run in.

  When you call a remote VI, the appeal made by the reference node uses the UI thread (detailed below) on both the client and the server.

  The client uses the UI thread to send the request to the server and there still when the response comes back. The user interface thread is not blocked during the time between the two.

  The server receives the TCP message in the UI thread, and then starts the call to the UI thread. The server also uses the user interface thread to send the response to the client. The user interface thread is not blocked on the server during execution of the VI.

  I hope that people find it when they need it!

  Ben

  
  

• VI, stuck to the call by reference

  Hello

  I currently have a problem of Subvi "call by reference. I am currently working on a datalog VI that takes a cluster (hidden as a Variant) and the writing of the elements in a text string. If the cluster contains a cluster VI datalog is called. When all the elements are written in the text string is written to a file and the text string is disabled.

  Here, I need reentrante run - so I am currently using property VI "re-entrant execution clone shared" and a "call by reference" with "Reload every call" to call him VI self. This was work up very well, but yesterday, after about 5 hours, the program is stuck at "call by reference. Have I set up correctly?

  Concerning

  Mark

  
  

• call by reference and UI VBAI

  Hello

  I am trying to build a table (recipe_array_mod.vi), in which using the top and pressed, activate the cursor to navigate the table and load the corresponding data in indicators and I got also will add a new recipe and information to load data. I got to the point where my VI for recipe_array_mod.vi works very well, however, so that this code works on the withour of UI custom VBAI thrown exceptions for all dependencies, I started to look in the reference method call using VI server. I'm new to labview and reading about the VI call by reference, environment type specifier VI refnum shows type of connector information. But I see no information on connectors when using this method. Do I need to have a full version of labview to exploit this method?

  Please look into this and give me some feedback and corrections of code to use it with an interface user custom VBAI.

  Thank you

  Here is an example of update. She is the nice user interface that you want the main VI and it dynamically calls the subVIs who are working with file i/o and using VI server dependencies (which are primitive screws so that they are not counted as dependencies). You need to update the path to your sub VI in the main VI and you must make sure to close the Ref VI in the State of cleaning of your inspection (comments in the code of the main VI explain this).

  Hope this helps,

  Brad

• Main vi sharing of sub vi with call-by-reference - how?

  Hello

  as mentioned in another thread (http://forums.ni.com/ni/board/message?board.id=170&thread.id=390355), I have a main vi with a stop button and a under vi, who needs a few seconds to complete.

  During the execution of the Sub vi, I want the stop button in the main vi take effect immediately, which means the sub vi must stop immediately.

  I know that I can exchange data between screws somehow by a call to reference, but all the examples I found, to transfer data from the sub to the main vi vi, but I want the other way around.

  Given that I've never used the call by reference, I have no idea how I can do it.

  Attached you find, what I've done so far.

  I would be very happy if you help me and show me how to use the call by reference correctly.

  Johannes

  LabVIEW 7.1 (I used to program in C and Labview 6)

  Win XP

  Johannes

  I solved it!

  A reference and a property node t - it.

  See attachment

  Johannes

• check the type VI for call by reference node

  Hi Ppl,

  I call a set of VI dynamically using call-by-reference node. And I have a type specifier linked to a component of a particular type connector. But at the time where the VI prototypes do not math I get the error from the open VI reference node. Is it possible to check if the components of connector VI matches before opening the refrence with the specifier of type VI?, or by using the error code is the only way to check if there was miss match to component connector VI.

  Thank you

  But what is the problem with error control?

  For example, I use the code like this in my application to detect what type of Dynamics VI should be used (decision based on the error output):

  

  Andrey.

• Scripting - reference control Replace inside the flat sequence

  Hello

  Just in the process of upgrading our software from 8.6 to 2011. A question that we have is references appear to be different to the old code. Example - if we create a new control reference, put it next to the old one, put a probe on the two, references do not match when we run the vi.

  This causes havoc with our very large amounts of code. We contacted OR that our support subscription and they required an example which we can really give.

  In any case...

  I thought that I would write a vi script to replace all old references of our code with new references.

  Problem is that I can't replace a control easily reference which is inside any kind of structure.

  I need a way to get a reference to a parent structure, I can then add to the structure.

  This will take place on large amounts of complex code, so there need to be versatile. Please see the attached Vi

  Thank you

  Joe

  I would like to make the following changes:

  

  • You'll want to use the 'Move' method, which allows you to specify an owner.  In this case, the owner is the schema that belongs to the original control reference.
  
  
  • You want to get the original order wire and get all its wells (i.e. not null index into the array of terminals), so that you know what to wire the new benchmark in control of.  That is why the Connect wire method is in a loop For... the original control reference may have wired to several objects.

  Let me know if you have any other questions.  As far as I know, all properties/methods that I am using the code above are available in LabVIEW 8.6.

• VI front panel does not close when it is done executing, when this vi was called by reference.

  I created a simple vi set to indicate the problem I'm having. I run dynamically under vi to leave a main application. Simply the main application is my test exec and the Subvi I call dynamically is different tests. In the example I have write here the criterion vi is called Test electric 1(vi). I configured this electric Test 1 vi to see the front when it is called and close later while initially closed.  Problem is that it doesn't close before.

  Other things to keep in mind

  • I want to be able to run the vi test and do not wait until it is done.

  I'm using LabVIEW 2012 SP1.

  

  Basically the fence after that call questions only if the VI is called as a Subvi (as if you open you a VI and run it, it does not close when it's done).  Are two ways to work around this or have your app high lvl close the VI when it's done, it's explained here:

  http://digital.NI.com/public.nsf/allkb/987B2026B41BD39786256CF800032E8C

  or having your VI close when it's done.  A reference of the VI and the front panel: Close call node.

  I hope this helps.

• call by reference and physical channel OR DAQMX

  Hello

  I call a VI of reference and one of its entries is a physical channel OR DAQMX.

  Normally when I call the VI (no ref) control of the physical channel OR DAQMX fill itself with a list of detected devices / channels.

  Still by reference it does not work because I'm the appellant on a server of VI. He shows me the channels on the local computer instead of the remote computer.

  How will you address the list of physical channels OR DAQMX on a remote machine?

  Here is an excerpt of how find my DAQ card by searching all DAQ hardware in the system, and then query string types I want. Note that this must be running on the remote system. Perhaps could you run on the remote system and use the TCP/IP, Messaging Protocol to transfer the results?

  Charles

• Open the Panel front of the Subvi, which is called by reference in the EXE

  I want to open the façade of a Subvi when it is called. This sub - VI will open the façade of a Subvi third level. So, I want to go back to the main.vi the output of the subVIs.
  I can do successfully in the development environment.
  I call on the reference asynchornously screws. If the screw load when they are called and the calling VI awaits the release of the subvi.

  I am attaching the screenshot of the window subVIs properties customize.

  When I build the application, the executable file could not be opened the Subvi front panel, even if the paths of the subVIs are related.

  I also put the subVIs in the field "Always included" the build properties and the box "Remove front panel" is not selected.

  I join the project and screenshots of the parameters.

  If you had used the dialogues of error, you would have seen the paths of access to the VIs you build are not valid.  The screws are always included in the EXE file, so you don't have to do any special stripping of the VI EXE path.  A fake wire to your case structure determine the path, and it works perfectly.

  Just dual-band is the path if you try to get the EXE directory.

• How do you call by reference to a VI within a PPL?

  Hello

  I want to dynamically call a VI, but do not want to wait for dependencies of all children of VI load every time, so I've compiled the VI within a packaged project library (PPL).

  I open a reference in VI by the path of the file by using a strict data type, and then call the VI by using the call through the reference node. It works with a VI, but I do not see how to specify a path to the VI within the PPL. Is this possible?
  Thank you very much

  Duncan

  
  

• Call by reference

  Hi all
  
  PARAMETERS in oracle subprogrammes are known to be passed by reference. That all C, I studied, would have implemented the code.
  
  Formal parameter of procedure P1:
  (per1 in NUMBER) - representation of oracle
  
  Now, the representation of C-> (par1 * int)
  . i.e. the par1 is a pointer to the address of the actual parameter passed to the invocation.
  
  
  
  
  Current setting while calling the procedure P1:
  x: = 111; - representation of oracle
  P1 (x); - representation of oracle
  
  Now, C representation
  x = 10;
  P1(&x); ---
  
  
  Is he really doing?
  
  
  I can totally wrong but its good to be wrong at times, with regard to the points below.
  
  Work of the compiler checking references syntax and semantics & creating a compiled code.
  The compiler creates some kind of C code? because oracle is written in C.

  Rahul K wrote:
  PARAMETERS in oracle subprogrammes are known to be passed by reference

  Yes, the PARAMETERS are passed by reference.

  OUT and IN OUT parameters are passed by value, unless you specify NOCOPY. If you specify NOCOPY, parameters can be passed by reference. See
  http://docs.Oracle.com/CD/E11882_01/AppDev.112/e25519/subprograms.htm#i4107

  The compiler creates some kind of C code? because oracle is written in C.

  By default, the compiler creates bytecode of PL/SQL that is executed by the interpreter of PL/SQL engine.

  11 GR 2, you can ask the compiler to create the C code. This is called the "native" compilation See
  http://docs.Oracle.com/CD/E11882_01/server.112/e25513/initparams193.htm#REFRN10253

  Published by: stew Ashton on December 30, 2012 12:56

• Call-by-value and call by reference

  Hi people,
  
  I hit Google to get to this simple answer but no were I could find a decent answer on this one. Can anyone tell me how do I pass a parameter by value and not by reference in Flex?
  
  In my main mxml file, I have this model I have go to a TitleWindow:
  
  [Bindable] private var preferencesModel:XML;
  
  private function preferencesPopup (): void {}
  var prefWindow:Preferences = preferences (PopUpManager.createPopUp (this, preferences, true));
  prefWindow.preferencesFile = files;
  -> prefWindow.preferencesModel = preferencesModel;
  }
  
  If I change this model in my popup window preferably change also in my screen, I don't want so I would like to pass this last line by VALUE, not by REFERENCE. Any idea?
  
  

  Edit: Oh! Just re-read your code and noticed that preferencesModel is an XML file. In this case, the solution is simple:

  prefWindow.preferencesModel = preferencesModel.copy ();

  That will move a copy of your XML file to the window, instead of the original XML instance.

  In any case, my comments below still stand until passing by value and the reference are concerned, and for the custom classes, the code is still valid. :)

  ActionScript 3 follows the rules of Java style when passing by value and reference - i.e. the primitives are always passed by value, and object are always passed by reference. To my knowledge, there is no operator to explicitly indicate the passing by value and by reference in AS3.

  To remedy this, you will need to add some sort of feature that creates a new object of your class instance, copy all the property values of the original object in a new, then retransmits the new object.

  Let's say you add a method called "clone" to your class:

  public function clone (): PreferencesModel
  {
  var newPrefModel:PreferencesModel = new PreferencesModel();
  newPrefModel.propertyOne = this.propertyOne;
  newPrefModel.propertyTwo = this.propertyTwo;

  [etc.]

  Return newPrefModel;
  }

  Then, in the code above, you would change the line to:

  prefWindow.preferencesModel = preferencesModel.clone ();

  In this way, prefWindow will refer to a copy of your preferencesModel object, instead of the original.

  I hope this helps!

• Cell calls in my new replacement Macbook iPhone Mac

  Hi guys,.

  I will literally ' crazy for this problem. I have an iPhone6 with OS 9.2 with has been used in the past months with my macbook. First simple to match my macbook with the iPhone and in about five minutes, I was able to use iTunes without cable using my wifi, sending messages, using FaceTime and (first of all the most important of them) was receiving cell calls when my iPhone was not near to me directly on my macbook.

  Recently, I bought a new Mac 2011 (same year of the macbook) and move all the files and the settings, I've already had my MacBook on this new device. I upgraded two devices for 'El Capitan'. I am able to use FaceTime and I message but not the calls on my new Mac when the iPhone is close to me. I tried to go into 'settings' of the iPhone like I did with my macbook the first time, when I go settings > application to other devices > allow calls on other devices, the only option I have is to allow calls on my old macbook, but I can't find my new Mac. I also tried to restart the network on my iPhone settings but nothing seems to change... Anyone know why I can do? Please help me!

  On the Mac and iPhone

  Disconnect from the iMessage

  Sign out of FaceTime

  Disconnect from the iCloud

  Restart the Mac and iPhone

  Connect to iCloud

  Connect to the iMessage

  Connect to FaceTime

  Ensure both the iPhone and the Mac are connected to the same WiFi network and bluetooth is enabled.

  Then try to activate call of continuity.