Ho to run LV-DLL in TestStand with bool-parameters?

Hello,
i´m using LabView 8.21 and Teststand 3.5. Currentlly i´m playing with the project-Explorer where i´m creating DLLs.
The first and easiest step was to create a new VI with string-in and string-out.
Then i added this vi to my project and created a DLL from it.
This DLL is called in TestStand where the parameters are automatically detected and everything works perfect.
But when i add an boolean-input and boolean-output und do exactly the same then Teststand says:
"This function either does not have parameter-information in the DLL or uses types not recognised by teststand."
The type of the boolean is "LVBOOLEAN" in the created header-file.
What
am i doing wrong? Why is this simple bool-value not working? If bool
works not then i can never use the Labview-error-out-cluster inside a
DLL?
Or is there an easy trick to solve this?
Thanks for your help

Hi OnlyOne,
I just verified your issue and figured out that a boolean value cannot be transfered to a LV dll, because the datatype representation of a boolean is different in LabVIEW than in C.
The flexible Prototype adapter from TesStand can identify the functions of your LabVIEW dll when you use basic datatypes like scalars, pointer to scalars or C strings. That's the reason why it works in your "String dll".
When one uses LabVIEW specific datatypes there will no typelibrary provided and it's essential to define the prototype manual in TestStand. I found a link that provides some more information to that:
http://digital.ni.com/public.nsf/websearch/DBCE27265FFB554986256C9400026FE8?OpenDocument
One possibillity to transfer boolean values simply to a LV dll would be to use a numeric value, for example an integer and use a comparison like "!0" in the LV dll to determine if the status means "true" or "false".
Hope that helps to come along with your application,
regards,
Nikolai

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The Run group has all the functional tests in it. (MainSequence)
The abort group is used to put everything back in it's original state after the test on this single product is done. (Post UUT)
When executing the tests and something goes wrong (operator gets stuck in a clamper, ...) the operator can still press the abort button and then the execution immediately jumps from the currently executing step in the run group to the first step of the abort group. So, when something goes wrong, immediately the abort group is called.
At the end of the run and abort group, if no errors occured, the "pass led" lights up. If one or more steps went wrong the "fail" led lights up.
This setup can also be used to test multiple product in parallel. At that time all the different parallel testers have such a small box which contains a "start" and "abort" button and a pass, fail and running led. (it is possible that they are all connected to the same PCI-DIO-96 board. )
My question:
Is it possible to do something similar like this in Teststand? If yes, is there an example available that shows me how to do this in TestStand? (externally trigger the execution of TestStand)
Typically, in the Init group (Pre UUT Loop) the digital interface box gets initialised.
In the Close group (Post UUT Loop) the digital interface box is taken out of scope.
Note: The PCI-DIO-96 board to which the digital interface box is connected will also be used in the rest of the developed application (MainSequence, ...)
What's really important for me is that I can create a process model that all the application developers in our organisation can use. I really don't want any of the application developers (limited software experience) to mess around in all the features of TestStand.
For them it's important that they just add the function DigitalInterfaceBoxInit () in the Pre UUT Loop Callback and the DigitalInterfaceBoxClose () in the Post UUT Loop Callback, and then everything works!
It is important that the appliation developers do not have to create any global variables, other functions, synchronisations, parallel sequences, ... in TestStand. All this needs to be done with a simple call to the DigitalInterfaceBoxInit function.
Thanks in advance for all the help!
Best Regards,
Dennis Vanotterdijk
[email protected]

Dennis-
Your application sounds very well suited to TestStand's abilities. I am also quite impressed with your knowledge of how TestStand's architecture is arranged when you are still just considering whether or not to use it.
I think that TestStand would work really well for you in this application. Like you mentioned it will provide you with a form of standardization for your application developers to work from. It also provides the flexibility for you to add your custom routines in many different places. TestStand also makes parallel and batch testing much easier in TS 2.0 so that you could develop one test for your product and execute different instances of it in parallel to test multiple products at once.
As for your specific question about how to c
ontrol TestStand using a DIO board. I think this is very feasible and should not be too difficult. Since TestStand provides you the ability to create a custom operator interface your operator interface could monitor the status of your DIO board and launch/abort executions based on the read values. Usually the executions are launched/aborted when a button on the GUI is pressed however, I do not see any thing different about basing the action on a DI signal vs a mouse click. I am sure your application is more involved than this high level description but from the sounds of it I think it is very possible to do with TestStand.
Based on my experience of building test systems with TestStand and your description of the application, I would feel very confident in using TestStand to achieve all the goals you mentioned. If you have further detailed questions on how one of your features might be implemented, feel free to contact one of our Application Engineers or email us at www.ni.com/ask
and we would be glad to help you.
Best regards,
Richard McDonell
National Instruments

Running in 64 bit mode with the 32 bit Oracle client installed

I have seen many postings on this issue but none of the suggested solutions have helped me.
I am running visual studio 2010 professional with SP1 on windows 7 64 bit machine. When I try to run a web service locally and call it with SoapUI, I get the following error message during OracleConnection.Open().
Attempt to load Oracle client libraries threw BadImageFormatException. This problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed.
I have tried setting up the build configuration and the project settings to target 32 bit but that has not helped. I have also tried removing the reference to System.Data.OracleClient that shows being under Program Files (x86) and add a new reference to the dll under GAC_64. That too did not work.
I only have the 64 bit client installed on my machine.
Any help will be appreciated.
Thank you

1. Visual Studio any version is 32 bit ONLY irrespective of hardware or OS bits. So to DEVELOP with Oracle Client you MUST install 32 bit Oracle ODAC components. Task manager will show devenv.exe *32 (to confirm 32 bit Visual Studio application).
2. You can run your web application inside IIS/IIS Express in your PC which independently can be either 32bit or 64bit. If it is 64 bit, you MUST also install 64 bit Oracle ODAC components which means you'll have to install both 32bit and 64bit in your 64 bit Win7 running on 64bit hardware.
3. In Visual Studio if you compile with "AnyCPU" as target, the resultant binaries (Web/NonWeb) can be both 32bit or 64bit. So if target PC is "AnyCPU" or "x64", you MUST install Oracle ODAC 64 bit in the target OS if that target OS is 64bit. You don't have to install 32bit ODAC in the target PC.
4. One more catch to above scenario is the target OS could be 64bit simulated OS on a 32bit hardware. In such case you MUST install both 32bit and 64bit ODAC components.
So while you ask your network team to download ODP.NET/ODAC Components make sure you ask them to download both 32bit and 64bit. Total nearly 600MB.
Hope this helps many people out there.

Running a .dll in a .VI

Hi, i have some issues running a dll in a .VI.
to be more specific...
I am running a main VI, and that main VI calls for a .dll when it is running labview crashes. after that y tried another way, I made the main VI a .dll then when i ran it everything went good.
so the question is, does labview have to run everything in .dll when something is in .dll or i can mix a .dll in a vi or viceversa
hope i explained myself

LabVIEW can call DLLs just fine, so you do not need to run everything in a DLL. Your most likely issue is incorrect configuration of the Call Library Function Node, or you are not managing memory properly. There have been many threads posted in the forum on calling DLLs with various parameters. There's a very extensive example that ships with LabVIEW called "Call DLL". I would suggest searching the forum for message related to the error that you are seeing and/or the kinds of datatypes you are trying pass into/out of the DLL. If you cannot find the answer, then post back. Please provide details, such as the DLL header file, or at the very least the prototype for the function, as well as your LabVIEW code for how you are calling the DLL.

JNI to access functions of a dll to deal with a data aquision pci card

i am trying to do an applicattion to access the functions of a dll
to deal with a data aquision pci card (Analogig/Digital pci card).
i�m using jni of course, but i have some problems.
first i did a class called "TesteDll" witch contains all the native methods to access the functions of the pci card.
after, i did a "TesteDll.jar" to use these methods in another applicattions.
everything was fine until there. so created a single program like this:
TesteDll td = new TesteDll();
short res1 = td.P1602_DriverInit(wTotalBoards);
short r = td.P1602_ActiveBoard((short)0); // ativa a placa
short res2 = td.P1602_GetConfigAddressSpace((short)0,wAddrTimer,wAddrCtrl,wAddrDio,wAddrAdda);
int dwRepeat;
for(dwRepeat=0 ; dwRepeat<100 ; dwRepeat++)
short wRetVal;
wRetVal = td.P1602_ClearScan();
wRetVal += td.P1602_AddToScan((short)0,(short)0,(short)1,(short)0,(short)0,(short)0);     // CH:0 to scan
wRetVal += td.P1602_SaveScan((short)0,wV0);
wRetVal += td.P1602_AddToScan((short)2,(short)0,(short)1,(short)0,(short)0,(short)0);     // CH:2 to scan
/* ->error here!*/ wRetVal += td.P1602_SaveScan((short)1,wV2);
the programs compile correctly, but in the execution the folowing error was descripted:
An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : EXCEPTION_ACCESS_VIOLATION (0xc0000005) occurred at PC=0x8079A50
Function=[Unknown.]
Library=(N/A)
NOTE: We are unable to locate the function name symbol for the error
just occurred. Please refer to release documentation for possible
reason and solutions.
Current Java thread:
at TesteDll.P1602_SaveScan(Native Method)
at Teste2.main(Teste2.java:119)
Dynamic libraries:
0x7CD80000 - 0x7CD9D000      C:\WINDOWS\SYSTEM\IMAGEHLP.DLL
Heap at VM Abort:
Heap
def new generation total 576K, used 161K [0x10010000, 0x100b0000, 0x104f0000)
eden space 512K, 31% used [0x10010000, 0x100385c0, 0x10090000)
from space 64K, 0% used [0x10090000, 0x10090000, 0x100a0000)
to space 64K, 0% used [0x100a0000, 0x100a0000, 0x100b0000)
tenured generation total 1408K, used 0K [0x104f0000, 0x10650000, 0x14010000)
the space 1408K, 0% used [0x104f0000, 0x104f0000, 0x104f0200, 0x10650000)
compacting perm gen total 4096K, used 1044K [0x14010000, 0x14410000, 0x18010000)
the space 4096K, 25% used [0x14010000, 0x141152e8, 0x14115400, 0x14410000)
Local Time = Wed Jun 01 10:21:14 2005
Elapsed Time = 0
# The exception above was detected in native code outside the VM
# Java VM: Java HotSpot(TM) Client VM (1.4.2_06-b03 mixed mode)
functions like "P1602_DriverInit(wTotalBoards)","P1602_ActiveBoard((short)0)" functions correctly.
i run the same program in c++ builder and everythings goes fine, but i need to do it in java. i don�t know what to do,can you help me?
thanks

i almost forgot, i�m using win 98.
First i used Dev C++ to make the JNI dll and the error ocurred at the first call of "P1602_AddToScan()" function. after i made the jni dll using C++ Builder, and the error ocurred at the second call of "P1602_SaveScan()" function. but the error message in both cases was the same.
for(dwRepeat=0 ; dwRepeat<100 ; dwRepeat++)
short wRetVal;
wRetVal = td.P1602_ClearScan();
/*First Error - Dev C++*/ wRetVal += td.P1602_AddToScan((short)0,(short)0,(short)1,(short)0,(short)0,(short)0); // CH:0 to scan
wRetVal += td.P1602_SaveScan((short)0,wV0);
wRetVal += td.P1602_AddToScan((short)2,(short)0,(short)1,(short)0,(short)0,(short)0); // CH:2 to scan
/* Second error C++ Builder */ wRetVal += td.P1602_SaveScan((short)1,wV2);
...

How can I pass a Variant to a C++ DLL from TestStand?

I have a VARIANT that is being returned to TestStand via COM. The variant contains a structure of integers and strings. The integers are not uniformly sized... some are 8,16, and 32 bit. Rather than try to find a way to decode this information in TestStand, I would like to pass it to a C++ DLL to do the decoding and return the information in a readily usable format. I also have need to take the aforementioned data types, send them to a DLL for conversion into a VARIANT, and then pass this variant to a COM object. Can someone please explain a way that I can use TestStand as a pass-through for VARIANTs between a COM object and a C++ DLL?

Hi,
To pass a VARIANT to a C++ DLL in TestStand, you will need to create a custom data type. From the sequence, change the View ring to Sequence File Types. Right-click to insert a new Customer Data Type and select Container. Now you can right-click to insert a field, which you can specify what data type it is. Insert as many fields as needed. After you have entered those in, right-click on the Custom Data Type name and select Properties. Go to the C Struct Passing tab and click the "Allow Objects of this Type to be Passed as Structs". Change packing to correlate with the C++ compiler you are using and also configure the properties for each field.
Once you have done this, you will be able to pass that VARIANT as a struct to a C++ DLL.
Thanks,
Terry S.
Staff Software Engineer
National Instruments

Using cvirte.dll from teststand

I am trying to use cvirte.dll from teststand to automatically print test result reports. I am starting with the example sequence PrintEntireReportWhenFinishedTesting.seq that I found on the NI website. I want to change the print font attribute. The dll doesn't include prototype information so I need information on the parameters for the SetPrintAttributeEx function. Specifically what number refers to the ATTR_PRINT_FONT_NAME attribute and what are acceptable values for the value of this parameter.
Attachments:
PrintEntireReportWhenFinishedTesting.seq ‏37 KB

Wendell,
I believe this question was also posted in the TestStand category. Since this is more of a TestStand question, it was seen and already answered. Please see Using cvirte.dll from teststand.
Thanks!
Shannon R
Applications Engineer
National Instruments

Ho to run LV-DLL in TestStand with bool-parameters?

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