Nilvaiu.dll functions

HI. I am trying to get the list functions of nivaiu.dll library. Does anyone know the the nivaiu.dll programming manual or related information.
Thanks
Gary

Hi Gary,
Thank you for your question but I am a bit uncertain if I have understood it correctly. From my understanding, nilvaiu.dll is a DLL that is built in to DAQmx. Is the issue then that you are missing the DAQmx functions? If so, it could be that your copy of the drivers are corrupted and I recommend reinstalling them. You can access them here.
Kind Regards,
Shalimar Ali
Applications Engineering Intern

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Question on the parameter type of DLL functions

Question on the parameter type of DLL functions
I am trying to develop an interface to control a laser with LV8.2 I am planing to use the VI “Call Library Function Node” to call the DLL and set the exact same parameters of functions in the DLL.
According to the DLL manual of the laser, there are six functions. One of the prototypes is: function getstatuspointer : pointer. I don't know how to set this parameter for the function. Is there anyone who can give some hints? Thanks!
BTW :The following is a description of the function:
This function returns a 32 bit pointer to the STATUS data structure (Tstatusrec). In the 32 bit DLL, every application is using its own copy of the data structure (local
memory). The data structure is a packed structure. "packed" means that the fields in the structure are not aligned on word or double-word boundaries.
Tstatusrec = packed record
                        size : word;
                        initstat : byte;
                        queuefill : byte;
                        anzapp16 : word; (not used)
                        anzapp32 : word;
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                        anzdock32 : word;
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Hi Jack,
This is a good starting point when using Call Library Function node. Check out this Help Page
Van L
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Error when calling a DLL function

Hi,
I am using external C++ code with labView. One of the DLL functions I use serves to call files. The directory and the name of the file is is passed as a parameter for this function. When the VI is running and arrives at this function (I use the Calling Library Function Node tool), the following message is displayed:
ERREUR de type class boost::filesystem::filesystem_error.
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Hello,
How are you passing the file path to the DLL -- are you passing it as a
string? If you are passing at as a string, I would do some basic
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corectly as a string and perform your appropriate C++ function in your
DLL. If the error is occuring with passing the file path you
might want to check out the links below for a little more information
on this.
http://zone.ni.com/devzone/conceptd.nsf/webmain/7d6a20fe02edbf318625690700704cf3#4
http://digital.ni.com/public.nsf/websearch/4E9234BA4C7C4ABE86256E3C0074760F?OpenDocument
http://digital.ni.com/public.nsf/websearch/3B994675B17C654A86256FDD00754DD2?OpenDocument
Hope this helps,
Travis M
NI
Travis M
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Iv'e created a DLL using CVI and i'm tring to call one of it's function from visual studio 6.0
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How to pass a struct to a DLL function and accessing it in another VI

Hi friends,
                   I am new to labview. I need to create a demo program in labview ,for displaying image from our own image capturing system. We have a DLL ( build in VC++) containing functions for capturing image from our system. Now I need to create a VI library for some of functions in DLL and Create a Demo program using those created subvi library . I used "Call Function node" and created some of subvi's.
Some of our DLL functions need to pass struct pointers. Our function prototype will be similar to the following function.
__declspec(dllexport) int __stdcall Initialize( unsigned char *imagebuffer,struct config *Configuration);
The passed struct is similar to
struct config
double                val1[3];
unsigned short   val2;
bool                    val3;
bool                    val4[3];
unsigned char    val5;
unsigned char   val6[3];
bool                    val7[26];
For passing "unsigned char *imagebuffer" I initialized array with "Numeric constant " and set the size of the array and send to the function.
The problem here is, I used this array in one of the subvi.
How can I use the returned imagebuffer array in my main demo program. How to connect the image array to subvi "Connecter Pane"
And which control can I use to display the image. The image data I get is form of 1-D Array .
The second problem is,
   For passing the structure, I used "Bundle " and filled the bundle with all the datatypes as in my struct and passed to the function. Is it correct ? How to access this bundle after returned from function in another Vi. ie.) How to connect this bundle to the connter pane ?
Thanks for your valuable suggestions.
aajjf.
Message Edited by aajjf on 04-19-2007 05:34 AM

aajjf wrote:
Hi friends,
                   I am new to labview. I need to create a demo program in labview ,for displaying image from our own image capturing system. We have a DLL ( build in VC++) containing functions for capturing image from our system. Now I need to create a VI library for some of functions in DLL and Create a Demo program using those created subvi library . I used "Call Function node" and created some of subvi's.
Some of our DLL functions need to pass struct pointers. Our function prototype will be similar to the following function.
__declspec(dllexport) int __stdcall Initialize( unsigned char *imagebuffer,struct config *Configuration);
The passed struct is similar to
struct config
double                val1[3];
unsigned short   val2;
bool                    val3;
bool                    val4[3];
unsigned char    val5;
unsigned char   val6[3];
bool                    val7[26];
For passing "unsigned char *imagebuffer" I initialized array with "Numeric constant " and set the size of the array and send to the function.
The problem here is, I used this array in one of the subvi.
How can I use the returned imagebuffer array in my main demo program. How to connect the image array to subvi "Connecter Pane"
And which control can I use to display the image. The image data I get is form of 1-D Array .
The second problem is,
   For passing the structure, I used "Bundle " and filled the bundle with all the datatypes as in my struct and passed to the function. Is it correct ? How to access this bundle after returned from function in another Vi. ie.) How to connect this bundle to the connter pane ?
Thanks for your valuable suggestions.
aajjf.
Message Edited by aajjf on 04-19-2007 05:34 AM
You say nothing about how your cluster looks but I'm afraid you did the standard error here and placed arrays in it. That is not what the C structure is representing for several reasons.
First fixed size arrays in C are inlined inside a structure, so are not a pointer but for the case of your val1 element three doubles.
Second although not relevant here because of above point: LabVIEW arrays are not the same as C arrays. LabVIEW uses a pointer to a pointer and has the size of the array in elements prepended to the array data. C simply uses a pointer and all the rest is the programmers sorrow. The Call Library Node does convert the top level element of variables you pass according to the type configuration of that parameter but does no conversion of internal elements at all. So passing clusters with anything like arrays or strings is always wrong unless the DLL is aware of the specific datatypes LabVIEW uses.
Last but not least you can end up with alignment issues. Elements in structures are aligned by every C compiler to a certain value. This value can be defined by the programmer in the project settings or for Visual C through #pragma pack() statements in the C code. The alignment rule says that an variable is aligned to the smaller of the two values that are either a multiple of the variable element size or the alignment setting. Most 32bit code nowadays uses 8 bit default alignment but LabVIEW always uses 1 byte. In your case there is nothing to observe since the large variables are at the beginning. Otherwise you might have had to insert filler elements in the LabVIEW cluster.
One last thing bool is a C++ type only. Its size is 1 byte and incidentially this is the same LabVIEW uses for Booleans.
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Have mutli ver of LV -7.1 to LV10sp1 on XP PC. DAQmx - nilvaiu.dll missing when try to open CODE from WIN7 32 bit LV10?

Have mutli ver of LV -7.1 to LV10sp1 on XP PC. DAQmx - nilvaiu.dll missing when try to open CODE from WIN7 32 bit LV10?
What Driver do I need? VERSION Please -- DAQmx works fine in LV8.6.
Solved!
Go to Solution.

Hi Briana,
I believe I understand what you're asking, but which current DAQmx driver are you using with LV 2010? Only the 9.1.5 and above drivers are compatible with LV 2010, while many of the older drivers will still work for you in LV 8.6. Below, I've linked a compatibility chart for DAQmx drivers and Labview versions.
http://digital.ni.com/public.nsf/allkb/F4E76EC05118F72D8625773000672298
Does this answer your question?
Regards,
Austin S.
National Instruments
Academic Field Engineer

Nilvaiu.dll pas trouvé avec LabVIEW 821...

nilvaiu.dll pas trouvé avec LabVIEW 821...
Impossible de reprendre un vi créé avec LabVIEW 820 : pb au niveau de l'assistant DAQ.
Merci d'avance.
T.

Peux être un début de solution :
http://digital.ni.com/public.nsf/allkb/A64B6D4665F7C8C686257248001D7656
Trouvé sur la knowledge base NI, un bon point de départ pour trouver des solutions
When my feet touch the ground each morning the devil thinks "bloody hell... He's up again!"

Error 0x80040707 - DLL function call crashed QTInstallCode

Installing QuickTime Stand-Alone QuickTimeInstaller.exe Version 7.0.4.0 I get the following error and QuickTime will not load or function:
Unhandled Exception
Error Number: 0x80040707 - DLL function call crashed: QTInstallCode.QuickTimePostInstallProc
Setup will now terminate.

I was able to solve this, but I had to uninstall all instances of iTunes, ipod and QuickTime, delete their directories, use http://support.microsoft.com/kb/290301/
to delete the installations of each and then use msconfig to remove them from the Startup.
After that I rebooted and did a new install with the QuickTime Stand Alone and it worked!

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I have written a program which calls dll function from a dll in eclipse platform.But I am getting Unsatisfied Linker Error.How can I solve this problem?Can anyone help me out?

Have a look at JNA:
https://jna.dev.java.net/

Calling DLL function using LabVIEW 7.1?

Here's the scinario:
I have LabVIEW 7.1 and i'm trying to call a DLL function using 'CALL LIBRARY FUNCTION NODE'.
I have used this in the past with no problem. But right now, when I use this node and link it to the
library and function name, i get 'ERROR loading Dllname.dll' message.
NOTE that the DLL is generated using VStudio2003 or VStudio.NET. Could this be a problem??
Also, i noticed that there are some JUNK characters before & after the function name that show
up in function prototype:
long ?EcpvsSign@@YAHHPBEH0HPAE1@Z(long Signer, CStr NonRMsg, long NonRMsgLen,
CStr RMsg, long RMsgLen, CStr SigR, CStr SigS);

tbd wrote:
Hi rkpat,
You might check-out this thread on building WIN32 DLLs - expecially the bit re: "mangles names" under the paragraph titled "C Language Source File". My recollection is that 'extern "C"' directive in the header file for the DLL solved the name-mangling problem, but it's been a few years!
Cheers!
Message Edited by tbd on 03-01-2007 11:19 PM
tbd is right. You have to first disable name mangling as it creates all kind of troubles. Other issues might be that your Visual Studio 2003 or .Net edition links in dynamic runtime libraries that are not standard available on every Windows PC so that you need to redistribute the according runtime library installer together with your app for the DLL to be even loadable.
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

How to Read DLL Function arguments in VC

HI,
I have a CVI dll, "modelsupport2.dll"
i need to access the parameters of one of its function "LoadModelPluginTypesAndConfigurations". Can anyone please suggest me how to read the parameters of the above dll function in VC++.
The function parameters are,
LoadModelPluginTypesAndConfigurations(CAObjHandle engine, int thread, const char *categoryName, const char *configurationName, BOOL loadAddons, BOOL loadPluginTypesFirst, CAObjHandle mergedConfiguration, char* asdd);
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The board I use is PCI 6221. I'm afread the multithread cannot work...

Receive a cluster from a dll function

Hi,
I have a function in a DLL which returns a C struct. I want to know how can I receive a cluster from a CLFN?
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int a;
int b;
const char * c;
int d;
int e;
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function call:
const typedata * hostinfo(int param);
Solved!
Go to Solution.

LVCoder wrote:
Thanks a lot both of you for letting me know about my dumb assumption that 2 different processes can use the same memory space.
Anyways, I figured out the problem with my code that was reading the double value.
the DLL function returns the address of the struct which has 5 elements.
struct test {
int a;
int b;
int c;
double d;
double e;
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address of test->a = 10
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address of test->c = 18
address of test->d = 26 // I was refering it as address 22. but I forgot that I was on a 64 bit machine and that the OS will allocate the whole memory address for a double and won't utilize the 4 bytes left in the previous memory address.
thanks!
That has nothing to do with the bitness of your CPU or the OS. It is only dependent on the compiler alignment setting when you compile your DLL. Microsoft Compilers use a default alignment of 8 bytes. That means every variable or element inside a cluster will be aligned to the smaller one of either its own size or the default alignment.
You can change the compiler alignment either with a compiler switch or an explicit #pragma iin your source code where you declare the variables or structure typedefs.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

LabVIEW call Win32 API DLL function from third party

Hi everyone,
I'm trying to build a LabVIEW 2010 interface on 32-bit Window XP system to configurate and communicate to an Anglient laser head through its USB expansion box. I contacted the vendor and they shared a win32 API with some dll files. I started with a function called "A55292Find", but the CLF node always pop up error 1097.I checked the MSDN to get the corresponding LabVIEW data type for CLF.
My question is: Do I need to initialize those arguments? (How can I know the values of them if initialization is needed?)
Could anyone help me figure out what's the problem?
Here is what I have from API documents about this function:
The A55292Find function returns lists of handles and board types for all the 55292 USB
Expansion Modules connected to the system.
A55292RC __cdecl A55292Find(
HANDLE hBoxes[], // List of handles for the boxes found. (as Unsigned 32-bit integer numeric)
BOARDTYPE PortABrdType[], // List of board types for slot A boards (as Unsigned 16-bit integer numeric)
BOARDTYPE PortBBrdType[], // List of board types for slot B boards (as Unsigned 16-bit integer numeric)
WORD *spMaxBoxes); // dimension for all of the passed arrays. (as Unsigned 16-bit integer array data pointer)
// (function return type as Unsigned 32-bit integer numeric)
Parameters
HBoxes[] Array that will receive the list of HANDLES for all the 55292 boxes connected.
PortABrdType[] An array that will receive Slot ‘A’ board type information for each 55292 box.
PortBBrdType[] An array that will receive Slot ‘B’ board type information for each 55292 box.
spMxBoxes Passes the maximum number of values that can be held in hBoxes, PortABrdType, and PortBBoardType arrays to the A55292Find routine and returns the actual number of boxes found
The return value will be one of the following A55292RC return codes:
Value Meaning
A55292_NO_ERROR No error
A55292_TIMEOUT Timeout accessing a shared memory
Remarks
This routine must be called to obtain handles and board type information used in calling all the other routines. If there are significantly more array elements than boxes, the routine will take longer to complete.
These are the definitions:
typedef DWORD A55292RC; enum{A55292_NO_ERROR, A55292_HANDLE_ERROR,...}
typeder WORD BOARDTYPE; enum{A55292_PCAL_BOARD, A55292_NO_BOARD, ...}
Thanks a lot,
Kang
Solved!
Go to Solution.
Attachments:
call A55292Find.vi ‏10 KB

nkang11 wrote:
Hi Mr. Kalbermatter,
As you told me, I should try to use the defined enumeration words as control and indicator.
For the previous CLF node, it successfully returned the hardware configuration (I have only connected a board at slot A):
But I really want to see a string return as "A55292_PCAL_BOARD" which is defined by "typedef WORD BOARDTYPE; enumeration {...}; Does that mean I need to change the data type or do something like "converter"? Or initialize the array first, then convert it to string type?
Right now, I'm trying to open the laser card by using "A55292PcalOpen(HANDLE hDev, SLOTSELECT SlotSelector);" function which requires to use the enumeration constants from " typedef WORD SLOTSELECT; enum {A55292_PORT_A, A55292_PORT_B};" but I'm confused to shot an constant control to a new CLF node.
Since almost all of the arguments in dll function are typedefined as WORD, short and struct et al, I hope you could give me some hints on it.
Thank you very much sincerely!
Kang
Depending on the actual C implementation you can simply create a LabVIEW enum with the according item names or use a ring control instead. Teh enum requires the numeric values of the items to be in consecutive order without any gaps in between. This is a given if the C definition never assigns a specific number to the item. If the C enum is not consecutive you need to go with a ring control instead.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

FRM-40734 when calling external DLL Function from Forms 6

Even though some answers were given to my previous help request ("Again: Forms 6 and user-defined data types") I wasn't able to solve the problem of passing a parameter of an user-defined type to an external DLL function residing in the SECURSIGN.DLL library (the closest solution was to declare that "composite" parameter using the ROWTYPE clause referencing a custom-made table created just for the sake of defining that perticular datatype).
So I concentrated on SECURSIGN.DLL functions using more trivial data types, like a function requiring just four character strings as parameters.
I generated the necessary PL/SQL support using the FFI.
I discovered that also the simplest calls to external functions fail at runtime with the generic error FRM-40734.
I located the error: it happens just at the moment of calling the function from within the FFI-generated package body. Before that, the DLL is loaded with no problem, the function is correctly registered, and a function handle is regularly returned.
As long as I can regularly issue the very same call with the very same parameters from Visual Basic, I can't understand what's going wrong (ALL the needed DLL are in the same directory as the FMB/FMX forms).
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I have noticed just now that a dump file having a name like ifrun60_dump_299, is generated by FORMS every time I issue the aborted call to the foreign function.
Inside the form dump file, apart from useless info like Registers and so on, the message:
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By a FILE/FIND/CONTAINING TEXT I searched all the DLLs, and I noticed that Module32First is a routine that can be found within each of the following DLLs:
Cl32
d2kwut32
d2kwut60
I tried to load those DLLs along with SECURSIGN.DLL by modifying the PROCEDURE LoadLibrary into the FFI-generated PLL code, and I have apparently no problem in loading all the DLLs that I wish, but the error persists, and that dump file is constantly generated, always looking for the "Module32First" routine.
How can I avoid all that mess and the FRM-40734 error??

Nilvaiu.dll functions

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