Building DLLs

I'm learning JNI and I try to use the sun's tutorial at: http://java.sun.com/docs/books/tutorial/native1.1/index.html
I can do everything with Java, but I can't compile the .c, my compiler (dev-c++) reports an error message in the first line: #include "jni.h".
And this tutorial just shows how build a dll with MS Visual C++, I need to do this with Dev-C++, does anyone knows how?
Thanks.

This is the full error report. This message still appear, but I can generate the ".o" object file and build the DLL with him. Now the problem is the Java program, they report tis message:
"java.lang.UnsatisfiedLinkError: displayHelloWorld
at jni.HelloWorld.displayHelloWorld(Native Method)
at jni.HelloWorld.main(HelloWorld.java:19)
Exception in thread "main" ".
I read in another message some solutions like put the library path in the path enviroment, or put the code extern "C" in the C program. Doesn't work!!!
I need to make a program in C to read systems info like disk capacity and free space, but I can't even make a Hello World Example, it's hilarious :)))
I'll appreciate any solution!
Thanks
[]s
Gabriel.

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Build dll error in application builder 8.6.1

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I get always an error in the LV 8.6 application builder, when I build a dll. There is only one function in it, that has a string and an error input, and nothing else. I attach a screenshot of the VI prototype, and hier is the error description:
Error 1 occurred at Building DLL.
A component needed for Application Builder does not support the required functionality. This might have been caused by installing an older version of LabVIEW after this version was installed. Reinstall the current LabVIEW version to correct this issue.
Possible reason(s):
LabVIEW: An input parameter is invalid. For example if the input is a path, the path might contain a character not allowed by the OS such as ? or @.
=========================
NI-488: Command requires GPIB Controller to be Controller-In-Charge.
After that I reinstalled LV8.6, I tried to reinstall only the 8.6 app builder, but no success.

Hello,
thank you for the reply.
I have solved the problem. I uninstalled the last installed LV version, this was 8.0. Then ran appbuilder again in 8.6, then I have got an instruction to run applibs\lvdllbuilder\lvdb.exe. Since then works.
regards
Mitulatbati

Error Building DLL, LabView 8.2

Hello everybody,
I'm building a
CVI application. I need some functions of LabView (related to time
series analysis), so I'm trying to build DLLs with the .VIs I need. I
followed all the steps necesary and visited all the related topics at
ni.com. I always get the following error:
Visit the Request Support page at ni.com/ask to learn more about resolving this problem. +¡
Use the following information as a reference:
Error -2147221480 occurred at Building DLL stub.
This can be caused by illegal function or parameter
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conflict with LabVIEW headers
This error code is undefined. No one has provided a
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Once, I got a correct DLL with no errors, so it should be possible for others.
This is an example of what I'm trying to compile:
And this is what appears, only for a moment, at the end of the
compiling (it didn't appear when I manage to build with no errors):
I'm using: LabView 8.2, LabWindows CVI 8.5, NI-DAQ 8.5, Windows XP (SP2)
Any suggestion is really appreciated.
Maybe another way to use this functions in CVI (I need functions related to spectral estimation, ARMA; MUSIC,...)
thank you!
Eduardo Tamargo
Spain

Hi Tamargo,
The following KnowledgeBases may help you find out what is happening:
Creating and Calling LabVIEW DLLs with Various Data Types from Microsoft Visual C++
What are the Differences Between "Array Data Pointer", "Array Handle", and "Array Handle Pointer"?
Calling a LabVIEW DLL from C with an Array in a Cluster as a Parameter
Have you tried developing a very simple VI with an array as an input parameter and checking if the same problem takes place when you build the DLL?
Regards,
David Oña

Error when building dll

I tried to run the example HelloWorld given in JNI tutorial. http://java.sun.com/docs/books/tutorial/native1.1/stepbystep/index.html
But when I try to build dll
I typed under dos
C:\Program Files\Microsoft Visual Studio\VC98\Bin>cl -Ic:\jdk1.3.1\include -Ic:\jdk1.3.1\include\win32 -LD HelloWorldImp.c -Fehello.dll
There was this error message:
/dll
/implib:hello.lib
/out:hello.dll
HelloWorldImp.obj
LINK: fatal error LNK1104: cannot open file "LIBCMT.lib"
Does anyone know what is wrong? Thank you very much for your help.

That looks like one of your libraries from Microsoft visual studios is missing or the folder it belongs in is not on your path. do a search on your computer to see if the file exists...if it does, make sure your path has that folder in it.
if the file is there, and on your path...try getting a fresh copy from your visual studios install cd. if you cant find the file on your hard drive, you can either add the file to the visual studio folder or try reinstalling visual.
good luck

Building DLLs from VIs with array as output

Is there any special way to build DLLs from VIs having arrays as outputs. Suppose I have a VI "Random" with input "nrand" and output an array "the_random2". When I build DLL from the VI, I have something like this in my header file
void __stdcall Random(long nrand, double the_random2[]);
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NRK

Hi,
Building DLLs in LabVIEW is described in this tutorial.
Mathscript can call shared libraries such as DLLs, however make sure
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Note that these functions are not supported with the base package. The
details of the sytax of each function is described in their specific
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Building DLLs with Returntype as string

Is it possible to pass strings to a function and get a return type as a string.
Actually iam facing a issue ,
I have built a VI with Input and output as strings,the VI is working correctly
when the dll for that VI,
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Attachments:
Output return option..JPG ‏164 KB
Return value option.JPG ‏157 KB

Hi,
Building DLLs in LabVIEW is described in this tutorial.
Mathscript can call shared libraries such as DLLs, however make sure
that they are compliant with the supported data types as stated here in
this help page. All supported functions for calling/loading shared libraries is described here.
Note that these functions are not supported with the base package. The
details of the sytax of each function is described in their specific
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Hope this helps!
Regards,
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Building Dll for labVIEW RT gives errors

Hi All
Does building dll for labVIEW RT using CVI require labview runtime engine to be installed?
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Regards
Arun

Hello Arun,
You don't need to have LabVIEW Run Time installed on your machine. Please check the link below to see the function that are supported by exporting the LabWindows/CVI LabVIEW RT Engine
http://digital.ni.com/public.nsf/websearch/D3EFE7C6F073384886256FDD005FBCDA?OpenDocument
Ame G.
National Instruments

Error -2147221480 occurred at Building DLL stub

When I build a Shared Library, I get following error message
Error -2147221480 occurred at Building DLL stub.
This can be caused by illegal function or parameter names. Please verify your names are legal C identifiers and do not conflict with LabVIEW headers
This error code is undefined. No one has provided a description for this code, or you might have wired a number that is not an error code to the error code input.
Can anyone help me out regarding this error...

To begin with, do didn't say whether you have checked the two possible errors listed in the error message:
1) the function and parameter names are legal C identifiers
2) the function and parameter names do not conflict with LabVIEW headers
How many functions does your DLL have? What are their names?
What parameters do the function(s) have? What are their names?
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

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Nadav,
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User events from labview build dll

Reference to pattern
Previous discussion
I had this pattern in place in a LV 7.1 application using a LabVIEW
build DLL, but when migrating to LV 8.5 I found that User Events
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Regards,
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Forgot to tell that I rebuild the DLL in LV 8.5, before making that conclusion.
Message Edited by andre.buurman@carya on 09-04-2008 01:12 PM
Regards,
André
Using whatever version of LV the customer requires. (LV5.1-LV2012) (www.carya.nl)

Microsoft.sqlserver.integrationservices.build.dll

Hi,
I am using MS build, but I am not able find the "microsoft.sqlserver.integrationservices.build.dll" I have looked in all the location. Can anyone let me know where I can get this DLL.
Thanks..
Regards Vikas Pathak

As Koen wrote, this DLL isn't shipped with SQL Server, it's a community Project on CodePlex:
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Application Builder: error in building DLL from a VI

I have a VI which I have been compiling into a DLL for use with Labwindows. Suddenly yesterday the build would no longer compile. Instead the error message (see attached picture) persisted all day no matter what I changed in the VI. Before the error message appeared, the Labview project window went blank for a moment, then showed some "C" code from somewhere, and then back to the project window. It's almost like something blew up in the compile process.
I've tried all suggestions in the error message. Checked data types and names. I believed the VI is wired back to where it was. There is not much to the VI but it does reference some .NET assemblies.
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Doug Wendelboe
Attachments:
VI-DLL-Pictures.zip ‏21 KB

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Thanks for your help.
Doug Wendelboe
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Attachments:
ApBuilderPics.zip ‏154 KB
ProjectFile.JPG ‏60 KB
ApBuilderPage1.JPG ‏31 KB

Application builder dll

Hello,
I'm going to build an app.exe for my customer. When I sent it to him he claimes several missing dll's. On my machine I have everything and nothing is missing.
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Thanks in advance
Klaus

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"Linking...
Creating library Debug/winport.lib and object Debug/winport.exp
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use /NODEFAULTLIB:library
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Debug/winport.exe : fatal error LNK1120: 1 unresolved externals
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srini,
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jigg
CTA, CLA
teststandhelp.com
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Building DLLs

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