Global variables in reports 6i

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• 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

• Cannot use Global Variable in the Structure of the event

  I'm using LabVIEW 2009.

  In my LabView project, I have a global Boolean variable called EStop. I can read and write the global variable. If I double click on the global variable, it takes me to EStop.vi which includes a text button. EStop.vi is part of my project.

  In one of my report, I have a Structure of the event. If I go to one of the event handlers in this case Structure and right click and select Add event, I get a list of possible events. But this list does not EStop or an EStop events.

  I would like to add an event to EStop case: changed value.

  Why I can not add to a case of events events that include events on Global Variables as value changed?

  How can I add EStop: event changed my structure of the event value.

  
  

• Acrobat javascript global variable

  What is the procedure step by step on how to set your global variable and where to report?

  You can create a global variable when you want, then when you do that really depends on when and where it should be accessible. If you provide more information on how you intend to use it, we can provide further details. Here are the basics:

  http://livedocs.Adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/JS_Dev_AcrobatForms.76.38.ht ml

  http://livedocs.Adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/JS_API_AcroJS.88.774.html

  The other important question is whether it should be stored so it can be accessed at the next startup of Acrobat. This is what the method of global.setPersistent: http://livedocs.adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/JS_API_AcroJS.88.778.html

• Global variables and the applications

  Version of the APEX = 4
  -DB version and edition = 10g
  -Web server architecture = SST
  -Browsers = IE 8
  -Theme = 5 # Opal
  -Models
  -Region/process type
  
  I need to run a report (not a report of the apex, but a report produced in annother (reporting services) technology) that can be executed by calling a url. I'll have different environments (dev, ft, ut, prod) so I feel the application needs to know what environment is running. The only way I can think to do this is to know what workspace I'm running in. I how I determine this code, is there I can refer to a variable of apex.
  
  Also a global variable is adjustable in the apex? If so it is defined on the homepage?
  
  Any help would be appreciated.
  
  Thank you

  The only way I can think to do this is to know what workspace I'm running in. I how I determine this code, is there I can refer to a variable of apex.

  This can be done by using the views of APEX:

  select workspace_id, workspace
  from apex_workspaces
  where workspace_id = v('WORKSPACE_ID')
  

  Also a global variable is adjustable in the apex? If so it is defined on the homepage?

  Normally it would be a part of the application, defined using a calculation of the Application.

• How to pass the global variable...

  Hello
  
  I have a report in a page and form in another page...
  
  If I clicked on the icon change in the report page it navigates to the form in another page...
  
  In this im report have "bill_amount" as one of the column, if I clicked on the icon change report page means, it will go to the form in another page...
  
  This form consist of one text field which is "bill_amount"...
  
  Since the report that I bill_amount for each entry, if I clicked on the icon change the means of the respective row, it does not appear automatically the respective bill_amount in the text in the form field...
  
  I created a report separately on the sql_query table... I created a form with a single field 'bill_amount '...
  
  Given that I na not create a report and a form based on the table... If I have created as it means if I clicked on the icon change it will show the datas respective in the form... since I created a report and form separately...
  
  If it is possible to create a global variable... who will bring the value of the "invoice amount" in the relationship and you will go the respective value in the form field on the next page...
  
  I don't want to put the value in the form field by restricting by request... She must take through the global variable...
  
  How can I reach it...
  
  It is urgent...
  
  concerning
  Mini

  Hello

  In her edit link column u give, the respective form field name, and the name of the column in the report inside...

  So that the value in the report of the corresponding column will be inserted into the corresponding field in the form...

  (IE) like this

  > p1_item_name---> #corresponding report name column #.

  Concerning
  GTA...

• Replacement of a URL with a Global Variable - syntax error

  I had a link URL address as following 30 places for printing the reports. That's why I decided to replace this URL with a global variable.
  
  The code was like this:
  
  Select ' < a href = "http://oasdev.oh.gov/reports/rwservlet?GDMS_ACR & Y ='|" : P106_YEAR | "& B =' | : P100_BUSINESS_UNIT_ID | "& C =' | : P106_COMMISSION_ID | "& d =('||) To_char(sysdate,'MMDDYYYYhhMISS') |') ...
  
  When I replaced it with the global variable like this:
  Select ' < a href = "GLOBAL_URL/reports/rwservlet. GDMS_ACR & Y =' | : P106_YEAR | "& B =' | : P100_BUSINESS_UNIT_ID | "& C =' | : P106_COMMISSION_ID | "& d =('||) To_char(sysdate,'MMDDYYYYhhMISS') |') ...
  
  It does not provide the value of the global variable. It shows that Web page not found error. Can anyone help?
  
  Thanks in advance
  Gouri

  Hello Kawa,

  When you say variable overall, do you mean to say the element of application level? If Yes, then you need to refer to that element, the same way that you reference level page elements using the: syntax.

  Change your query to something like this...

  Select '

  Thanks,
  Machaan

  href=" "="">

• Using global variables in a device custom

  Hello world

  I have problems with the passing of data through my device customized using global variables. I want to allow a user to select a RIO device address when you set up the system definition file. This is recorded in a global variable using the hand Page VI. I would later use this RIO device address in RT driver to deploy a bitfile. I can hard-code, but it is much more convenient to use a global.

  When I try to store the address of the global variable, it updates the value temporarily (I confirmed that the structure of the event recognizes the change of value). When I click the node of the tree to define system linked to the Main Page VI and then click on it again, the hand Page VI runs again. I wrote the code to repopulate the address of device of RIO with the last value stored in the global variable, but it is empty. I've included the VI global variables in my build, so I can't imagine why it can reset this value.

  Any help would be appreciated!

  Thank you

  Mitch

  Have you tried to use the custom device properties to store this value instead of GVs?

  Configuration VI, you can set this property, and if I'm not mistaken, you can read these properties on the RT driver.

• DLL and global variables

  OK, here's a strange problem.  I am very new to create the dll, so I don't know that I have just an installation problem.

  But I'm trying to pass a global variable of a host program to its attached DLL.  I got this job when I was the CVI 2014. I recently upgraded to 2015 and then started getting "undefined symbols" errors.  With some struggle I managed to compile again, but broke the variable connection in the process.

  I have compiled my DLL in debug mode so that I walk in from the test project.  Right now, my global variable exists in the test project, as well as in the DLL.

  Can I export the variable and the use of DLLIMPORT/DLLEXPORT?  Confused and curiously not to find anyone quite like this on the forums.

  EDIT: this post stack overflow described pretty well from my experience.  I am linking statically.

  Well, what do you know?  I found my problem.  This draft article and example WERE vital to the solution.  This article called, "using the Export method qualifier"was also useful.  I'll cut to the Chase...

  If you use a qualifier of export on the definition and the import on the declaration, LabWindows/CVI identifier export symbol.

  This is the right key.

  So in my example, it should look like this:

  DLL fichier.c

  int DLLEXPORT varName = 0;

  Header.h DLL

  int DLLIMPORT varName;

  Project that uses DLL.c

  #include "header.h DLL.
  
  varName! = 1 ;  a method to change this variable for local use

  Pretty easy, huh?  But wow, it took some time to find.

• 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)

• Global variables for circular buffer

  Hallo!

  I have another question:

  I need to have a variable circular buffer size. So I want set size circular buffer by a global varable.

  Is this possible? I tried to use the global variable like {VAR_01} to insert in the field that you want to the memory size circular buffer, but dasylab puts only a zero in the field.

  Thank you and have a nice day.

  Hilby

  Unfortunately, it is not possible to have a variable size buffer. Right-click in the textfield corresponding: the shortcut menu does not show an entry to select the global variable from a list.

• Addition of new global variables

  I change code that uses one or more global variables in a global folder of vi. I would like to add a few variables more and potentially change what exists and ask them to be in the same globals vi. I can easily add a variable of the same type by copying and pasting a variable of the same type on the Panel before the globals vi, but I can't add variables of different types.

  This post comes closest: http://forums.ni.com/t5/LabVIEW/how-to-associate-existing-global-variables/m-p/1079535/highlight/tru... but I did not understand this line:

  • Add FP (there may be several elements in a global variable VI)

  I read some of the warnings against the use of global variables as it can cause race conditions / lead to General illegibility. I'm curious what is recommended if global variables are used as the constants that are defined at the beginning of the program. In general, my LabVIEW code gets pretty unreadable if I have a lot of threads for all of these constants. Is there something better?

  Thank you!

  Kristen

  Hello kllurie,

  The scenario you mentioned (using globals to replace duplicate constants) is probably the best use cases for them - conditions of race etc. problems arise when they are used to the stream or in several scenarios of the writer.  Readability is perhaps a matter of concern, because it is not immediately clear what could be reading from or writing to a global when a thread would suffice.

  With regard to the modification of the globals vi, all you need to do is drop objects on the front of the range of controls (right click).

  Kind regards

• Functional Global Variables: an indicator can be used instead of a shift register?

  It is a simple question, but I can't find an answer to it. The model agreed to a functional Global Variable is to use an uninitialized as in this example shift register:

  

  ('Référence IN' and ' Reference to "is actually a pile of references.) There is also a "Se Refnum" case, which comes the straight through the tunnels shift register.

  My question is, why can't we do store the indicator data? It is much simpler to use a shift register (IMHO a non obvious way to store global data!):

  

  The case "Se Refnum" does absolutely nothing. Other functions such as erasure of data can be implemented just as easily. The advantage of the FGV to help avoid race conditions is maintained because you always use the VI to access the data.

  JonP says:

  
  

  Not so much, the Inidicator can happily live outside the case structure, together and Clear would be just assign different values.

  If you have only a case structure, the indicator could not live outside of it.  In order to maintain the indicator data, your design requires that it is not written in for a case of Get.  If you have an exterior structure deal that decides on 'Get' or 'set or clear' and (in the case of "Set or clear") contains the terminal of the indicator and a classiquee case that decides on 'Set' or 'clear '.  However, I would consider this a design below using the standard template of the FGV.

  The difficulty with retrieving the value if you want to do a read operation / writing change. But LV provides many ways to retrieve data from an indicator (one you don't mention is the 'Value' property), do you mean that's all "incorrect"?

  Yes (I mean that they are all incorrect).

  You could hack your way around the design to work with a single structure of matter and the terminal of the indicator being outside using a method to read the value of the indicator and through a tunnel to the structure of the case through wiring for the tunnel of writing indicator in the case of 'Get '.  However, who will require a local Variable or value of property node.  As I said, these (I only mentioned the local Variable originally) are not good choices for performance and scalability.  If you are not aware of the functional differences between the terminals, local Variables and nodes of property value, refer to this article (obviously advantages/disadvantages such as redraw objects on the front panel are not relevant here).

  I guess you could say that indicators should only be written, but it is difficult to be pure!

  No, it's not, just use the classic design of the FGV!

• 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.

• How to create a Global Variable through the Project Explorer

  Hello world!

  I know how to create a global variable (in a vi through the range of functions...).

  but I'm missing a way to create one via the Project Explorer.

  It's a missing feature or just this documentation (and the intuition of myself) are missing?

  It would be very convenient.

  THX for your time and hope that answers.

  jwscs

  Right click on my computer > new > new... > select Global Variable.

  EDIT: although I agree with Gerd (he probably wondering why you need so we can recommend a better way ), I rarely use them in easy to write once - read many applications such as security levels overall program at initialization (VER) to read later, but NOT modified.  I know it would be better to make a good class, functional Global Variable (FGV) or a motor Action (AE) but globals ARE practical and safe IF used wisely.