LabVIEW module use DLL

In a teststand sequence file, it uses LabVIEW modules that call .NET DLL. The DLL cannot be linked to the program. If I were using LabVIEW only, I know that I can insert the DLL into a LabVIEW project and the VI in the project will know where the DLL are. However, I am not sure about teststand. Can someone help? Thanks!
Kudos and Accepted as Solution are welcome!

Are you asking because you want to deploy the system? If yes, you should create a workspace and add the .NET DLL to your project as additional file. You can use the Deployment Utility to include the DLL in a MSI (Microsoft Installer).
If you are NOT asking in the context of a deployment, please elaborate your question....
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

Similar Messages

How to use dll in Labview ?

I compile this code to dll file with VC++2010 filename is test_dll.dll .
#include "stdafx.h"
#include <iostream>
#include <Windows.h>
using namespace std;
int main(int a){
cout << "Test dll...............\n";
return a;
After that, I put Call Library Function node in editor and double click Call Library Function node. I browse test_dll.dll into Library name or path and set function prototype to int32_t main(int32_t a); but it show error Call Library Function Node 'test_dll.dll:main':function not found in libraly. How to use dll in Labview ? And I have more question is what is differrent from Tools -> Import -> Shared Library(.dll) and use Call Library Function node.
Solved!
Go to Solution.

The issue you are having is that LabVIEW is not capable of using C++ DLLs directly. It only handles C DLLs. This does not mean that if you you cannot use the DLL if it's compiled with the C++ compiler as opposed to the C compiler. Rather, it means that you must take extra steps in order to use it from LabVIEW. The primary issue is that of name mangling or adornment. This is discussed here: http://zone.ni.com/devzone/cda/tut/p/id/4877. Basically you need to prepend extern "C" in front of your prototypes in your header files. I would also suggest reviewing this article: https://decibel.ni.com/content/docs/DOC-14564.

Using DLL functions created with LabVIEW 6i in CVI 4.0.1

I want use SQL functions from LabVIEW 6i in LabWindows/CVI 4.0.1. Building DLL with this LabVIEW-functions was succesfull, but after using DLL in CVI project and run, error message was generated: FATAL ERROR : LABVIEW.LIB was not called from a LabVIEW process. Can you help me? In attachment are VIs and build script for this DLL.
Attachments:
DLL.ZIP ‏24 KB

The SQL toolkit appears to be an ActiveX program. Why not call the objects with activeX in CVI directly?
There are several hits for labview.lib on ni's site. Goto http://search.ni.com/?col=alldocs&layout=TechResources&ql=a
and search for labview.lib.

How to make a driver using DLL in LabVIEW?

I had followed the "Using Exteranal Code in LabVIEW" manual having finished the making dll file, and the lsb file(I attempted that two ways). But when I load the code in LabVIEW, it can't work. I don't know what had happened, I only got a error message like this:"'0x100014f1'commond call memory'0x00000000',this memory can't be written" or other similar error message, if I push the "enter" button, the vi application which I having lunched will crash. If I push the "cancel" button, the debug model will start,and the next message is "Unhandle exception in LabVIEW.exe(MSVCRTD.DLL/LVS95.TMP/COUNTER.DLL(the last one is creat by myself)):0xC0000005:Access Violation", but I wonder what had cause this? My DLL had been made successf
ully under the VC++6.0, why LabVIEW can't call it fluently? How to make a driver for my own device using LabVIEW? How to correct my error to finished my hole work? Thank you very much. Jacky Wei
Attachments:
counter1.rar ‏33 KB

1. Can you call this DLL from within VC?
2. What operation system do you use? There may be a problem with calling of win95 dll under NT or win2000 for example.
3. If you use NT you may not have permissions to work with some ports and memory areas.
4. Under NT or win200 try to compile the library as a 32-bit dll, and under win95 - as 16-bit one.
Good luck.
Oleg Chutko

Creating LabVIEW module adapter TestStand Steps using the API without loading module prototype???

Is it possible to programatically create a TestStand step (using the API), that calls a LabVIEW module, without loading the prototype of the module to get a reference to the Module Parameters.
I want to specify a VI Pathname, but I dont want to use that pathname to load the prototype. I want to programatically specify the name, type, representation etc. of each of the controls and indicators.
My reason for attempting this is that I only want the VIs called by the steps to exist on the target hardware not on the numerous development machines running my application.
Any thoughts greatly appreciated.
Steve
https://decibel.ni.com/content/blogs/DailyCLAD

Hi Steve,
Unfortunatly it is not possible to do what you want within Test Stand but I am not sure why it is necessary, I think I am understanding your application incorrectly. The only time you will need to load the prototype is if you are creating the step but if you are creating the step you will need the VI that the step calls so that VI will need to be present on the system. If you are not calling the step then you shouldn't need to load the VI prototype. If this is how you program funtions it may be a problem with your architecture but if not please could you correct my misunderstanding so that I can go about finding a suitable solution.
Regards,
Tom
Applications Engineer
National Instruments UK & Ireland

Faulting module lvrt.dll, version 7.1.0.4000, fault address 0x002aed62.

I have build an application with LabView. Recently we the application crash and we get the following event on the event viewer:
Faulting application vica.exe, version 0.0.0.0, faulting module lvrt.dll, version 7.1.0.4000, fault address 0x002aed62.
I will appreciate it if someone can give me the solution of this problems.
VJH

Regarding to the problem of
lvrt.dll, version 7.1.0.4000, fault address 0x002aed62.
whe have tryed to deinstall the runtime and install the runtime and executable, but the same message occure if ther is a lot of action if a operator clickes objects on the interface)
Because of that te problem stills occure even after deinstalling and installing, whe have switched the Panel PC with a clean Windows Xp SP 2 panel pc but als on this machine the problem occures.
Fast clicking on objects on the unse interface can result in this message, ( the user interface picture navigation works with use of Invoke node to call the screens )
The same problem occure on different machines with the same application version and i can reproduce them in different application based on the same software.
Could anyone addvice wat whe can do?
Greetings
Robert Nijhof
Automation engineer

Error Occuring While Processing Data With DIAdem 8.1Exception EAccessViolation in module ntdll.dll at 000111DE. Access violation at address 7C9111DE in module 'ntdll.dll". Read address 37363430

Hello,
We are having an issue running Diadem 8.1 on a new HP XW 9400 with Windows XP SP2. 3 errors have been occuring with frequent crashes, they are:
1) "1Exception EAccessViolation in module ntdll.dll at 000111DE. Access violation at address 7C9111DE in module 'ntdll.dll". Read address 37363430.
2) The instruction at "0x7c9111de" referenced memory at "0x352e302d". The memory could not be "read".
3) ---Error--- DIAdem
Error in Autosequence - processing in line: 74 (IARV_VAR_GET)
Runtime Error while executing command "Iarv2Txt$ := FR(T9,L1)"
Error type: ACCESS VIOLATION
Error address: 000101DE
Module name:ntdll.dll
We are using the same scripts and version 8.1 on a variety of Dell desktop computers (W2K and XP SP2) without any issue, looking for suggestions as this affects no other software on the HP XW 9400 other than DIAdem. Appreciate any suggestions.
Message Edited by swillh on 06-25-2007 08:55 AM

Christian,
I will answer your questions in the text below. Thanks for your help.
Hi swillh,
I also would like to help you.
Unfortunately, The reported access violation in the central Windows ntdll.dll is very unspecific.
May be the following questions will help you to provide me more info.
1. You mentioned that the aut's and - I think - also the accessed text file reside on a server.
Is there a stable network connection?
The server can sometimes be a little slow but the connection is good. This computer is using the same connection that the prior computer utilized without issue.
Are the files accessed by multiple clients simultaneously?
It is possible that more than one computer can be accessing the same file, but again, this has never been an issue. We are reading the files only, not writing to them.
The processing routines we are running have used for over 5 years without any issues until adding this computer.
Is the text file read by one client while another client is writing the same file?
No, files are "read only"
2. Have you already tested opening the file with the FileOpen command before calling FR?
Yes
Do you see any chance to convert the aut to a vbs file? This gives you more alternatives in accessing text files.
3. What do you mean with "processing ATD's with 30 or more channels of data"? Where is the relation between ATD files and data channels?
Processing Crash Dummy data with file sets low in channel count (15 channels) result in successful processing without any crashes or access errors. When processing dummies with more than 20 channels we sometimes encounter these issues. The higher channel count may be the only common factor I can find in these faults.
Steve
Message Edited by swillh on 07-09-2007 08:44 AM

Faulting application iexplore.exe, faulting module jvm.dll

I see there are a few posts on this sort of problem, but please bear with me as this is somewhat different.
I develop a browser Add-on and one of my customers is experiencing an IE7 crash using Oracle/Jinitiator, with an event log message:
Faulting application iexplore.exe, version 7.0.6000.16827, stamp 49a74cd5, faulting module jvm.dll, version 0.0.0.0, stamp 4469a9b3, debug? 0, fault address 0x00050e18.
This may be related to my Add-on, so I'd like to know of any reasons that an Add-on could cause this situation. I see from other posts that it can be caused by an Add-on using a different JVM to the one used by the oracle app, however we don't include a jvm or use any java code, so it seems like it must be a different problem. The crash occurs on start-up of the oracle app and I'm told they're using Jinitiator on Win XP SP2. I don't know the details of their jvm or jinitiator versions.
I'm completely unfamiliar with oracle apps and JInitiators, so any pointers would be great. E.g. suggestions for them that may work around any such problem (like upgrading to latest JVM), or possible causes of any conflict between my Add-on and Jinitiator.
As my customer's app is not externally accessible I've not yet been able to replicate this. Here's another question (Example Oracle Forms app viewable online? asking for example apps that I might be able to use to replicate this.
thanks,
- Rory
Edited by: user11176059 on 18-May-2009 04:25

Our browser Add-on is only available for IE, and the problem only happens when the add-on is running. So we've not tried Firefox but it wouldn't help unfortunately.
- Rory

Call function in LabView from a DLL, then access global variable from DLL

I have created a DLL in LabWindows with a function and a structure. I want to call the function from within LabView and then access the global structure. I am able to call the function from the DLL with a "Call Library Function Node" and can access the return value, but I cannot figure out how to access the global structure. The structure is declared in the DLL header file with __declspec(dllimport) struct parameters.
Is there any way of accessing this structure without using the Network Variable Library?
Solved!
Go to Solution.

dblok wrote:
When you say "access to" or "the address of" the global variable, do you mean to pass the variable as an argument to the function call in the DLL? If so, then I was not really sure how to pass a cluster from LabView by using the "Call Library Function Node".
Yes, that's exactly right. I would include a pair of helper functions in the DLL to read and write the global variable. Alternatively you might write separate helper functions for each field inside the global structure, depending on the number of fields and whether you want to do any validation on the values.
You can pass a cluster by reference to a function that expects a struct by setting the parameter to Adapt to Type, so long as the cluster does not contain any variable-length elements (strings or arrays). The cluster needs to match the struct exactly, and sometimes that involves adding extra padding bytes to make the alignment work. Variable-length elements in LabVIEW need to be converted to clusters containing the same number of elements as the struct definition (for example, if your struct contains char name[12], you would create a cluster of 8 U8 values, and you could use String to Array of Bytes followed by Array to Cluster to convert a LabVIEW string into that format). If the struct contains pointers it gets more complicated, and it may be easier to write functions in the DLL to access those specific elements individually.
If you can't get this working or need help, post your code and an explanation of the error or problem you're seeing.
EDIT: it is also possible to include a single function in the DLL that returns the address of the global variable, which LabVIEW can then use to access and modify the data, but that's more complicated and likely to lead to crashes if you don't get the memory addressing exactly right.

Invalid page fault in module cvirte.dll

I have updated two old programs using LabWindows 7.0 which were perviously created with an earlier version of LabWindows. I am having problems though updating a third program. I get an error stating...
Characerization (the name of the program) caused an invalid page fault in the module cvirte.dll at 0167:684b77f5.
The operating system that I am installing these program on is Windows 95.
I'm not sure where this error is coming from but I'm assuming there might be a problem when I build with LabWindows 7.0 and install to Windows 95. But, the previous two programs updated before this one have had no problems at all. Any help is greatly appreciated.

JuanCarlos,
Thanks for you help. Since I have been getting this error, we did some system monitoring and noticed that when the system crashes, the CPU is running at 100%. It also crashes during debug mode as well. I have been putting in break points to specifically find a location. What we have come down to is that its writes the test information to a file, but crashes when the file is recalled within the program to process some results. As far as GPIB drivers, everything is correctly installed and since we are using old ISA slots, I have made sure there are no IRQ conflicts.
The funny thing is...this exact program works perfectly fine on another station but crashes on this current station! We need both fully functional though.
Is there a
nything I should look for specifically to tell if its a GPIB problem? Anything specific for CVI problems?
Thanks for you help!
Paul

Access violation at address 6761D581 in module 'ORA805.dll'.

hi Gurus,
When ever I try to connect the database through toad , I got this error 'Access violation at address 6761D581 in module 'ORA805.dll'. Read of address 00000010'. Please help me to resolve this issue.
Oracle database: 10.2.0.1.0
Oracle client: oracle froms 6i (sql 8.0.6.0.0)
toad: 10.5.0.41
Thanks in advance
Sadiq

Toad Advisor shows
Warnings
1- Incompatible Client and Server
Client version (8.0.6.0.0) and server version (8.0.0.0) should not be used together according to metalink note 207313.1.
Incorrect NLS_LANG
2-
NLS_LANG is AMERICAN_AMERICA.WE8ISO8859P1. Expected WE8MSWIN1252 (AMERICAN_AMERICA.WE8MSWIN1252) for Code Page 1252, Language ID 1033 (English (United States))

Faulting application Photoshop.exe, version 9.0.2.0, faulting module ntdll.dll, version 5.2.3790.4455, fault address 0x0001bd02

Hi,
I have Photoshop CS2 9.0 version installed on my PC with patch 9.02. I have a VB application which runs certain action files on EPS/TIF images using Photoshop typelibrary.tlb.The issue is that the VB application hangs when Photoshop crashes with the following error:
"Faulting application Photoshop.exe, version 9.0.2.0, faulting module ntdll.dll, version 5.2.3790.4455, fault address 0x0001bd02"
I also get several other errors when i call Photoshop in my VB application. Those are as mentioned below:
1. The referenced memory could not be read.
2. The remote server machine does not exist or not available.
There is no particular pattern for above mentioned errors. I could not find any help in any of the forums.
I have attached the screenshot of these errors.
Pls advice.
Thanks in advance,
Shobha Patil

I to have been getting this error, randomly when I exit the program. Not sure what to make of it google has come up empty for me.

Release 4.2(1) Build 15 Patch 4 - faulting module SchemeLayer.dll

Hi All,
For the last few day's I am getting the following error on one of my acs servers.
"Reporting queued error: faulting application CSAdmin.exe, version 0.0.0.0, faulting module SchemeLayer.dll, version 0.0.0.0, fault address 0x0002c370"
It running on windows 2008 32 bit - dedicated server. The anti-virus is set to exclude this directory.
Form a last search it looks like it might be one of the Microsoft patches causing this. - Does anyone know what patch this might be.
I don't have this issue on my other 3 servers running the same setup / patch levels..

Hi Martin,
Try upgrading to latest ACS patch. If that did not resolve the problem try uninstall then install ACS + patch (take abackup before uninstall and restore after).
If you still experience a problem I think you may need to contact cisco for that. Developers may be able to identify what is exactly going on and narrow down the cause of this until they find the windows patch/process that is causing this.
btw, have you tried reloading the machine? or turn off/on the ACS service?
HTH,
Amjad
Rating useful replies is more useful than saying "Thank you"

Structure using dll

Hello all,
does anyone know how to operate on the structure in LABVIEW?
I need to develope the interface in LabVIEW to call the external code WinMCL Plus (developed by GSI Lumonics),
but I do not know how to operate on the global parameter sets. I try to use DLL to call the function
"MC_set _ParamSet" (see below), but I cannot point to the parameter sets in the "Call Library Function".
MC_set_ParamSet
//       Routine Description:
//                     Set the global DLL Parameter set at Params[Index] to
//                     the values stored in *p
//         Parameters:
//                        Index - Parameter set index.
//                        *p             - Pointer to the parameters to set.
//          Return Value:
//                        WMCL_OPERATION_OK or WMCL_OPERATION_FAILED.
//         Comments:
WINMCL32_SPEC unsigned long_stdcall MC_set_ParamSet(int Index, PSET *p);
Any help would be greatly appreciated. Thanks in advance for your help.
Gennady

Gennady,
Check out this link to get some more info...
http://zone.ni.com/reference/en-XX/help/371361B-01/lvexcodeconcepts/configuring_the_clf_node/
Near the bottom of this link it has the section ;
Calling Functions That Expect Other Data Types
It looks like your best solution would be to create a wrapper that splits up this structure into more basic elements for labview. Hope this helps.

How can I change the ordering of the parameters listed under the Labview module?

Is there anyway to change the ordering of the parameters listed in the parameters table under the Labview module tab in TestStand? Each of these parameters printout in my report, but I need to change the ordering of the parameters in the report. Thanks.

Hi,
There is not a way to manually change the order of the parameter values in the Code Module Parameters Table, but there are a few options for configuring the report ordering of these parameter values.
Option 1: Use the Additional Results in the Properties tab to add a Custom Result. You can then save the parameter values to these custom results and order them they way you desire. This ordering will be reflected in the report.
Option 2: You could use a Post Action in the Properties tab to swap the parameter values that are saved to Locals.ResultList[0].AdditionalResults at run-time. This would require the use of a local variable to serve as a temporary placeholder for one of the values in order to successfully swap the values.
-Adri
Adri Kruger
National Instruments
LabVIEW Product Marketing

LabVIEW module use DLL

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