I want to call DLLs generated in LAbWindows CVI in Borland C++ (BCB 6)

Hi,
I want to call DLLs generated in LabWindows CVI in Borland C++, I am using BCB 6 and LabWindows CVI 8.
I am able to call these functions in VC++, But getting following error in BCB
":[Linker Error] 'D:\GAJANAN\CVIDLL.LIB' contains invalid OMF record, type 0x21 (possibly COFF)"
Please somebody suggest me how to solve this problem.
Thanks and Regards
Gajanan

Duplicate post.

Similar Messages

Using DLLs created with LabWindows/CVI 8.0.0 in LabWindows/CVI 8.0.1

Hi,
I have created a project containing some methods with LabWindows/CVI 8.0.0 and then build the project and generated the DLL and LIB files. These DLL and LIB files are working fine in another projects created in LabWindows/CVI 8.0.0 (even on another machines).
But when I use these DLL and LIB files in a project created with LabWindows/CVI 8.0.1 on another machine and try to call the methods of these files, the following error occurs: -
"The program has caused a 'Unknown' fault at 001B:7C812AFB"
Is this error occurs due to ther version mismatch or there is some other problem?
Please help me to resolve this issue.
Thanks,
Sarabjit Singh

Judging from this, I don't think NI has a newer version of this tool:
http://forums.ni.com/t5/Measurement-Studio-for-VC/Convert-project-from-LabWindows-CVI-to-Visual-Stud...

Permission Denied Error when calling Matlab script from LabWindows/CVI

Hello,
I am reading in data from a DAQ and am writing it to a .csv file in LabWindows/CVI. I am then sending this data to Matlab to be filtered. I would like the filtered data to be accessed by LabWindows/CVI so that I can display it as a strip chart. I have gotten everything to work except the writing to a file in a Matlab script that is called from LabWindows/CVI. I am basically using the shipped example in found in the activex demo. (http://zone.ni.com/devzone/cda/epd/p/id/2994). I select the script that I want to run and each time it tries to open a file with write permissions I get a "Permission Denied" error. This occurs when using fopen() in Matlab. I have also tried using csvwrite() as well as dlmwrite(). Each one gives me a similar error. The script currently does not try to do any data processing. It just opens the file, if it is successful it then prints "hello" and then closes it. The script works well when it is run in Matlab, just not when it is called in LabWindows/CVI. Below is the script. Any thoughts, comments or suggestions are greatly appreciated. I am also open to using other approaches for sending data between Matlab and LabWindows/CVI. Thanks in advance!!
fclose('all');
[file, errmsg] = fopen('out.txt', 'w');
if(file<0)
   disp(errmsg)
else
   fprintf(file, 'hello');
   fclose('all');
end;
[file, errmsg] = fopen('out.txt', 'w');
if(file<0)
disp(errmsg)
else
fprintf(file, 'hello');
fclose('all');
end;

I am using Windows 7. I am running CVI as an administrator and was able to get rid of the "Permission Denied" error by going into the User Account Controls in windows and changing it to "Never Notify". However, this did not fix the problem of Matlab not being able to write to a file when the script is run from CVI. In the Matlab code below, It now gets in to the "else", suggesting that fopen() returns a good file handle. After getting in to the else statement, it will not actually write to the file, nor does it create it. However, I can make changes to the plot settings and those appear. Everything is functional when run from Matlab but when run from CVI, things get screwy with opening the file for writing. It handles the read well. It seems like there would have to be some file permission errors but, in the CVI program, I open and write to the file "in.csv". Any help is greatly appreciated.
clear;
fclose('all');
t = zeros(1000);
t = csvread('in.csv');
for i=1:1000
   t(i) = t(i)*4;
end;
[file, errmsg] = fopen('out.txt', 'w');
if(file<0)
   disp(errmsg)
else
   fprintf(file, 'goodbye');
   for i=1:1000
   %t(i) = t(i)*3;
   fprintf(file, '%f,', t(i));
   end;
   fclose(file);
   plot(t/3, t);
   ylabel('t');
   xlabel('Time (s)');
   title('Is this really working?!?');
end;
Thanks,
Chris

"HOW to use Labview call Dll compiled by VC++"

"hello,I use VC++ compile a DLL,and i want to call DLL Function in LABVIEW program.But there is a dll function
when i call it in labview.There is error.The prototype of Dll Function that make error is "USHORT DLLFUN __stdcall IBWRT(unsigned short dev_address,const char *pstrWrite)",The second paramenter is a char pointer,
and the paramenter pass a command which content is
"MEASURE:CURRENTC? 1A,0.001MA".
When i use VC++ to call this function,i program followed:
CString m_wrt;
int ReturnW;
m_wrt="MEASURE:CURRENTC? 1A,0.001MA";
char buffer[40];
strcpy(buffer,m_wrt);
ReturnW=IBWRT(4,buffer);
and this call is correct.
But when i use labview to call this function.ther
e is
error.So, who can help me,to tell me how to call this
function.Thanks."

Are you asking about porting code or calling C++ code in LabVIEW? As far as porting code, there's no easy way to move code back and forth between LabVIEW and C++. However, if you are trying to call C++ code in LabVIEW, you can compile it as a DLL and call it in LabVIEW using the Call Library Function node.
Chad B. » National Instruments » ni.com

Can I convert Labview panel to Labwindows/CVI uir file

I a project that I want to convert from labview to Labwindows\CVI.
I don't want to call my VI's from LabWindows.
It is possible to convert some Labview fronts panels to *.uir files (Labwindows/CVI)
Thanks

Hi Artus!
Unfortunately there is no automatic way to convert a LabView Front Panel into a Labwindows UIR.
The only way you can do this is by creating a new interface and adding all the elements that you need, but this way would actually mean rebuilding everything based on something you already have. Sorry about the bad news
I wish you the best day!
Oswald Branford

Error: LabWindow CVI driver for Lab View 2011 (using hp4145a)

What is the DLL for the Agilent hp4145a instrument driver?
I am trying to convert the LabWindows/CVI Agilent hp4145 intrument driver for use in labview 2011, but keep getting errors related to an incorrect DLL.

Hi Courtney L.,
Your prompt response is much appreciated. Thank you.
I have attached the "hp4145 LabVIEW Wrapper Conversion Report" as a txt file
- this report was automatically downloaded along with the"LabVIEW Instrument Driver Import Wizard (LabVIEW Interface Generator for LabWindows/CVI Instrument Drivers)" *(link listed below), and popped up at the end of the installation.
If any specific details or a screenshot will also be of benefit to solving this problem, I will be able to post them by tomorrow night.
*Link for Instrument Driver setup download:
https://lumen.ni.com/nicif/us/infolvinstdriver/content.xhtml
Attachments:
LabVIEW_Wrapper_Conversion_Report.txt ‏6 KB

Conversion of an Instrument Driver from LabWindows/CVI to LabVIEW

Hello All,
Conversion of an Instrument Driver from LabWindows/CVI to LabVIEW
http://zone.ni.com/devzone/conceptd.nsf/webmain/9A93316BEBEDB17786256FA300675A0A
But I can not find any hyperlinkt to download
"LabVIEW Interface Generator for LabWindows/CVI Instrument Drivers"
Is there any evaluation version for downloading?
Thanks,
nonomiya

So strange,
I go through three pages but does not find any entry for download,
hmm...,
1. After press the hyperlink,
See Also:
LabVIEW Interface Generator for LabWindows/CVI Instrument Drivers
2. and for a resuest info. form.
3. press download..
====
LabVIEW Interface Generator for LabWindows/CVI Instrument Drivers
System Requirements
NI LabVIEW 7.1 or later
Windows 2000/NT/XP
Use the LabVIEW Interface Generator for LabWindows/CVI Instrument Drivers to create LabVIEW VIs for VXIplug&play and IVI-C instrument drivers from function panel (.fp) files.
Instrument Driver Network
Before using the conversion utility to create a new instrument driver wrapper, please visit ni.com/idnet to see if a LabVIEW Plug and Play instrument driver is available for your device. The Instrument Driver Network (IDNET) provides support for more than 3,000 different instrument models from over 170 different instrument vendors.
Recommendations
This utility was created for developers of C-based instrument drivers who wish to provide a LabVIEW interface, but do not develop a LabVIEW Plug and Play driver. By developing the C and LabVIEW interfaces together, it keeps the components synchronized, and eliminates the need for customers to create their own LabVIEW interfaces. Vendors should distribute the LabVIEW wrapper files with the associated VXIplug&play or IVI instrument driver, so that end users do not have to visit multiple web sites to download the complete driver.
If you are not an instrument vendor, we recommend that you use this utility only if you have instrument driver expertise. Access to the instrument driver source code is preferred, in case you need to edit the C instrument driver in LabWindows/CVI.
After generation, the wrapper VIs should be tested with the instrument.
Instructions
Once you install the software, simply access the utility from the Tools>>Instrumentation>>Import CVI Instrument Driver...menu in LabVIEW. This software replaces the built-in tool and provides feature enhancements.
For additional information on this utility, view the resources below.
Readme for the LabVIEW Interface Generator for LabWindows/CVI Instrument Drivers
Submit your Driver
Visit the Instrument Driver Network
nonomiya

How to pass a pointer in labview library call function by using dll programmed in Labwindows?

Hi,
I'm trying to interface a camera with Labview. However, the camera can only be programmed by C, so I'm using Labwindow CVI.
I need to pass a camera handle from one function to another, eg. from a opencamera function to setparameter function.
/* Load the Qcam driver and Open the First Camera */
void DLLEXPORT LoadDriverAndOpenCamera()
QCam_CamListItem cameraList[10];
unsigned long cameraListLength=sizeof(cameraList)/sizeof(cameraList[0]);
//load the driver
QCam_LoadDriver();
//get a list of the cameras
QCam_ListCameras(cameraList,&cameraListLength);
//listLength is now the number of cameras available
QCam_Handle hCam;
//Open the first camera in the list
QCam_OpenCamera(cameraList[0].cameraId, &hCam);
Apparently, caemraId is an unsigned long (unsigned 32-bit in Labview 2012 32-bit? ) and QCam_Handle is defined as void*, so it's a pointer that points to an unsigned 32-bit.
When I only use C for programming, I can pass hCam variable to other functions as long as it's declared as global variable. Ex, the next function can be void SetParameter(QCam_Handle hCam). However, here I'm trying to make a dll by Labwindows/CVI and then call LoadDriverAndOpenCamera() function through library call in Labview.
My question is: How can I pass hCam to other functions in the same dll? Do I have to add paramter to the function? For example:
void DLLEXPORT LoadDriverAndOpenCamera(unsigned long cameraId, QCam_Handle* cameraHandle)
And then add two lines:
cameraId=cameraList[0].cameraId;
cameraHandle=hCam;
into the function? Then I can pass cameraHandle out? However, hCam will still have void* type.
Even if that's the case, how can I set up library call node on Labview? In the arg parameter set up, I don't see pointers? It seems I cannot set up an output node to be a pointer that points to a unsigned long.
Thank you very much for your help!
Best,
Charles
Solved!
Go to Solution.

Hello Charles,
I noticed you posted a similar question here. do you have any further questions about using the call library function node?
Haley N
Applications Engineer
National Instruments

The problem about call dll from VB....

Dear All.
I have a device and VB dll file.I want to use labview to call dll.But Labview show "An Exception occurred within the external code ..."
Below is to call this dll details.
1、FindHardware：
Call it at beginning when load program first, it can let program auto detect printer port address and model of dso scope.
parament
winversion：
winversion = 2 "Windows NT,XP"
UIP: open UIP(2048) array
UCP:open UCP(1023, 1023 + 11, 6) array
return：
board_model：
dso2902_128 = 27
Then is my program
Could somebody tell me what's wrong?
Attachment file is this dll.
http://us.f1.yahoofs.com/bc/500cf3ac/bc/dll/dll.rar?bfd1QSDBkHPgKI9c
Thanks.
由 Samyang 在 10-09-2005 07:14 AM 上編輯的訊息

I can't say I understand the documentation snippet you provides, and I also can't access the DLL, but here are a couple things...
1. I doubt very highly that a VB DLL is built with the C calling convension. I believe you should try the stdcall instead.
2. You have the winversion being passed by pointer, but the docs make it look like a regular integer. Is that correct?
3. Your board model is being passed by value, but it is listed as a return value in the docs. That would indicate an actual return value or a parameter passed by reference.
My guess is that one or more of the above is causing the stack to get corrupted or an invalid pointer to be accessed and that is generating the error. Is there anyway to see the document (pdf or webpage)?
Brian Tyler
http://detritus.blogs.com/lycangeek

How To use or call dll ?????

Hi !
I have created one programm and i have genetared dll of that ( Using
LabVIEW) now i want to call that from vb.net how i can Do it
please help
Thanks in advance

tst wrote:
Lycangeek wrote:
But you can't get a front panel control integrated into a VB.NET panel.
Brian,
this is obviously impossible when the control is part of a running
program, but don't the LV style control appear in the list of
registered ActiveX controls as ComponentWorks controls? I'm
not near a computer with LV at the moment to check.
No
almost all LabVIEW controls are native implementations in LabVIEW
itself. They have nothing to do with Component Works or Active X at
all, although I guess the Component Works developers did get some
inspiration from LabVIEW controls but even more probably from
LabWindows/CVI controls.
Exception to this is the 3D graph which is a Component Works control
incorperated into LabVIEW through the Active X control container (and
my own private opinion about this control is that it sucks in several
aspects, being an Active X control is not the least of its faults).
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Q: Must one use special LabVIEW types (e.g. float64) for DLLs in LabWINDOWS/CVI?

Hello,
I have recently started compiling C code using LabWindows/CVI, and have successfully called a simple DLL function from within LabVIEW.
I have a question about the types defined in LabVIEW's extcode.h file:
These are defined to explicitly quantify the number of bits used for each data type (e.g. float64 instead of float) in order to eliminate ambiguity across compilers.
When I am using LabWindows/CVI to compile, do I need to use the LabView numeric types defined in LabView's extcode.h, or can I use the standard C types (int, float, etc.)?
Is there a distinction between having to use these special types for CIN versus shared library calls in LabVIEW?
Thanks
in advance,
Frenk

You do not have to use the defines in extcode.h, but you certainly can if you want to.
The float64 is equivalent to CVI's "double", and the float32 is equivalent to CVI's "float".
These correspond to the double- and single-precision types in the IEEE Standard for Floating Point Arithmetic, IEEE-754.
I hope this helps.
Brian

Call Labview generated EXE with Parameters

Hi
I have generated an exe in a Lab project(bcos of the no of VIs = 300)
I want to call this EXE in   Teststand with Parameters
how to achive this
mytry1)   as executable but the cluster outs cant be exported to teststand
mytry2) as a dll   called in Teststand -> I cant see the outs (it just provides one return value)
Attachments:
sapouterror.PNG ‏190 KB

Dear aparab,
does the following article help with the DLL call?
http://digital.ni.com/public.nsf/allkb/22BF02003B4588808625717F003ECD67
Kind regards

I want to call pl/sql procedure or function

hi i'm in need to create record in my table throgh ADF , so i called sequence from java class (create) . its working but one major problem is if i delete one record in table means , when i create new record it ll generate next value in sequence only, ya that is the concept of sequence. that's why i want to call sql function or procedure from java class. give the syntax to call.

San-717,
How about this (from Steve Muench and SRDemo)
public final static int NUMBER = Types.NUMERIC;
    public final static int DATE = Types.DATE;
    public final static int VARCHAR2 = Types.VARCHAR;
    public final static int CHAR = Types.CHAR;
    public final static int ARRAY = Types.ARRAY;
    public final static int BOOLEAN = Types.BOOLEAN; /* this may be illegal??*/
    public Object callStoredFunction(int sqlReturnType, String stmt,
                                        Object[] bindVars,
                                        String callableStatementString,
                                        boolean pRunPreAndPostMethods) {
        if (pRunPreAndPostMethods) {
            runBeforeJDBCCall();
        CallableStatement st = null;
        try {
            // 1. Create a JDBC CallabledStatement
            st =
        getDBTransaction().createCallableStatement(callableStatementString, 0);
            // 2. Register the first bind variable for the return value
                st.registerOutParameter(1, sqlReturnType);
            if (bindVars != null) {
                // 3. Loop over values for the bind variables passed in, if any
                for (int z = 0; z < bindVars.length; z++) {
                    // 4. Set the value of user-supplied bind vars in the stmt
                    st.setObject(z + 2, bindVars[z]);
            // 5. Set the value of user-supplied bind vars in the stmt
            st.executeUpdate();
            // 6. Return the value of the first bind variable
                 return st.getObject(1);
        } catch (SQLException e) {
            throw new JboException(e);
        } finally {
            if (st != null) {
                try {
                    // 7. Close the statement
                    st.close();
                } catch (SQLException e) {
                    e.printStackTrace();
            if (pRunPreAndPostMethods) {
                runAfterJDBCCall();
    }

Call DLL from PL-SQL block

Hello all,
I want to call a function located in an external DLL from a PL-SQL block. I execute the followin steps :
1. Create a database library pointing to the external DLL :
create or replace library libstk as 'C:\SUMMIT\libstkdte_s_trade1.dll'
2. Create the definition and the body package :
CREATE OR REPLACE PACKAGE dllcall IS
     FUNCTION s_trade (
          s_in VARCHAR2 )
RETURN VARCHAR2;
PRAGMA RESTRICT_REFERENCES(s_trade, WNDS);
end dllcall;
show errors
CREATE OR REPLACE PACKAGE BODY dllcall IS
FUNCTION s_trade (s_in IN VARCHAR2) RETURN VARCHAR2
IS EXTERNAL
NAME "s_trade"
LIBRARY libstk
PARAMETERS (s_in           STRING,
RETURN STRING);
END dllcall;
show errors
set serveroutput on
3. Start the PL-SQL block calling the external function. And I got the foolowing error :
1 begin
2 dbms_output.put_line ( dllcall.s_trade ( '<Request> ' ||
3 '<CurveId>MYCURVE</CurveId> ' ||
4 '<Mode>02</Mode> ' ||
5 '<ExpCcy>GBP</ExpCcy> ' ||
6 '<AsOfDate>20001023</AsOfDate> ' ||
7 '<Entity>***SUMMIT-XML***</Entity> ' ||
8 '</Request>') );
9* end;
10
11 /
begin
ERROR à la ligne 1 :
ORA-06520: PL/SQL: Error loading external library
ORA-06522: Unable to load DLL
ORA-06512: at "V31.DLLCALL", line 0
ORA-06512: at line 2
The "Read - Execute permissions" of the DLL file was given to "Authentified users" .
What's wrong ?
TIA
PS : NT2K environment, DB 8.1.7
R. Charles Emile

Yes, a RPC was set up.
Listner.ora
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = Server1)(PORT = 1521))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = NMP)(SERVER = Server1)(PIPE = ORAPIPE))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\Oracle\Ora81)
(PROGRAM = extproc)
tnsnames.ora
extproc_connection_data =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(CONNECT_DATA = (SID = PLSExtProc))
Thanks
RCE

Calling Dlls from LabVIEW

LabVIEW Gurus:
I am working with some software engineers who have no experience in LabVIEW. Unfortunately I have little experience in C/C++ to make sense of their inquiry.
Basically we are dealing with “Data Marshalling”. I will call a DLL and issue a command (string) and get back a 2-D array and an integer. So far so good.
The C/C++ programmer requested that I provide them with a pointer/memory address in which they will store data, so I can read it once the dll returns the array and integer. I browsed through the example online http://decibel.ni.com/content/docs/DOC-1690 and thought that if I wanted to read from the dll, the process is a simple as calling the appropriate function and configure the parameter (no pointers needed).
So, is there a specific way that they need to write the C/C++ code to be used in LabVIEW? Or what else to I have to take into consideration?
Thank you,
Santiago

That example is pretty simplistic as it only deals with integers. In this case no pointers are required since everything is returned by value. When you're dealing with arrays, however, you need to deal with pointers. If you open the Example Finder (Help -> Find Examples) and search for "dll" you will see the "Call DLL" example. That contains many examples of how to call DLL functions with a wide variety of datatypes. I strongly suggest looking at that example. There is also a chapter in the LabVIEW Help on calling DLLs (Fundamentals -> Calling Code Written in Text-Based Progamming Language).
You have 2 things to consider:
You're dealing with arrays - this means you typically need to pre-allocate the memory in LabVIEW, and it sounds like that's what the DLL expects you to do. This amounts to using the Initialize Array function to create your 2D array of the appropriate size and datatype.
You may be dealing with a C++ DLL. LabVIEW can only interface to C DLLs. This doesn't mean that you can't create a DLL in C++, but it does mean that the C++ programmers need to add an extern "C" modifier to the function calls, otherwise you get name mangling, and LabVIEW won't be able to call the DLL. The DLL programmers should know what that means.

I want to call DLLs generated in LAbWindows CVI in Borland C++ (BCB 6)

Similar Messages

Maybe you are looking for