Dll Shared lib functions not recognised?

Hi
I would like to wrap all functions of one Dll file. I am using import shared library. I have selected the dll library and the header file. After I set the following preprocessor definitions: _MSC_VER;__cplusplus; 7 of the functions are recognised. I wrote the warning messages. I added the mentioned preprocessor definitions but nothing have changed. Could you please help to resolve the problem?
Attachments:
Dll_Headers.zip ‏2433 KB

LabVIEWs call Library Node does not use header files nor library files but only shared library files. As such it simply will attempt to load the shared library you specify in the Library Path and that will fail if the DLL depends on other DLLs (which the OpenCV DLLs do heavily) that might be not in the Windows shared library search path.
Now your comments let me believe that you happen to use the Import Shared Library Wizard instead. This Wizard is likely overwhelmed by several issues in the header files, so it is likely not a good idea to even attempt to use it.
By the way IMAQ_Image may be a NI-Vision datatype, it for sure is not something you can directly interface to any LabVIEW datatype. Here is already one of the challenges of interfacing image libraries to LabVIEW.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

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Call a dll for Labview: Function not found in library

Hello,
I am trying to call a very simple .dll form Labview. I compiled the .dll for x64 using Visual Studio 2010, because I am using Labview(64-bit). I did everything exactly the way I read it in several Tutorials. But the "Call Library Function Node" doesn't create a popup menu with the avalible functions like it is supposed to do. The Import Wizard doesn't find any functions neither. What is wrong with my .dll?
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Thanks
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Solved!
Go to Solution.
Attachments:
DynamicLibrary.zip ‏2452 KB

You need to define an entry point to the DLL
BOOL APIENTRY DllMain( HANDLE hModule,
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Beginner? Try LabVIEW Basics
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Extractvalue function not recognised

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You are right on ExtractValue. I was thinking the wrong situation. In PL/SQL you can do xmltype.extract(), but you cannot do xmltype.extractValue().
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You should be more specific with your environment.
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Timed Loop in Shared Lib caused LabWindow program to NOT exit

I have a shared Lib created in LabView that I call from LabWindows. If I create a VI with nothing but a Timed Loop and no other code, my Labwindows program will not terminate. (Even if I don't call the library function (VI) containing the Timed Loop).

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Lightroom 5.7.1, Yosemite OS X - Synchronise Folder function doesn't work in Lr. Is there a compatibility issue? I can see the folders/images in Finder but when trying to synchronise folders in Lr it does not recognise that there are any images and theref

Lightroom 5.7.1, Yosemite OS X - Synchronise Folder function doesn't work in Lr.
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Hi Elba,
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Shared Review Publish function not available

I'm using Adobe Pro 9 (9.2.0) to create a Shared Review using a network folder. I am able to create the file correctly and SOME people are able to use Acrobat Reader 9.2.0 to Publish comments. The Publish function does not show up in Acrobat Reader 9.2.0 for many people and they are only able to save a copy. This isn't really using the Shared Review function at all.
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If you're having this problem with Adobe Pro, then update the following registry entry:
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Hopefully, this will benefit somebody and save them hours of time and frustration chasing Forums that never get resolved.

How to re-configure family sharing if you're not recognised as the administrator?

How to re-configure family sharing if you're not recognised as the administrator? I have several apple machines. Four of them use i.o.s. 8. I want to configure family sharing, but it will not start. I says that it is already configured and suggests that I ask the administrator (it uses the name of that person, which is me) to send me an invitation. It does that on all my machines using ios 8. So I'm at a loss, how to solve this.

It sounds like you aren't logged into your (organisers) iCloud account.

Call library function not finding DLL in directory where my LLBs are

I am using LabVIEW 8.6. I have a set of VIs in several LLBs. All the LLBs are in one directory. Most of my VIs are wrappers for the functions in one DLL. I was told to put my DLL in the directory where the LLBs are, and supposedly this is how the previous programmer worked (using an earlier version of LabView).
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Thank you.
Batya
Solved!
Go to Solution.

rolfk wrote:
Well somebody using your library should not have to dig into your VIs and do all this on his own. Instead your library should wrap that and hide the troubles of this entirely.
That is EXACTLY what I want to do.
The error cluster was added when the dynamic path option was added. It is not useful to hide that error output so it is always there. Together with the dynamic path there was improved error handling added to the CLN. One of them is that the level of error checking during the function call (exception handling) can be specified. I would assume that some of those options can generate an error code instead of popping up a dialog as they did before and for that the error code output can be useful even in the static call case.
As to what you want to do, I would long ago
I would long ago have done a lot of things differently on this project -- but no one asked me then :-) (Good thing it wasn't me, or maybe I'd have taken offense ;-) )
have handled that with a wrapper DLL that has basically the same functions as your other DLLs and some initiliasation function that returns a pointer to a function dispatch structure based on the actual DLL you want to call.
OK, I am getting the feeling that this will be a brilliant and elegant solution when I fully understand it. I understand what a wrapper DLL is. But do you mean that each version of my product would include a different wrapper DLL (with the same name so that CLN would always work), or the same one and it would somehow be told which actual DLL I want to call? Who would decide which DLL, the VI or the wrapper DLL?
By a function dispatch structure do you mean a table of function pointers gotten by GetProcAddress, one such entry for each function?
Quite like what an object oriented function dispatch table is. Then when initilising your interface you call that initialise function and specify the interface/device type you want to use and after that all the other functions take one additional function dispatch pointer parameter as first parameter in addition to the parameters the actual function has. This function dispatch pointer would be just a pointer to a structure containing the table of function pointers for that interface and for the sake of LabVIEW would be simply a pointer sized integer.
The wrapper function then verifies the function dispatch structure pointer for validity and calls the actual function with the remaining parameters.
I think I understand what the wrapper functions need to do. But I am missing some pieces for the initialize function. It would have to do LoadLibrary and lots of GetProcAddresses -- that much I get. But I still don't understand who decides which DLL. Maybe you mean that the wrapper DLL's initialize function will get the DLL name and path from the registry, load it, try a different path if the load fails, etc. Is that what you mean? That could work very nicely. But from where would it get the registry key? From the VI? This is the part that would clearly be different for each product. I suppose that you had something in mind when you described your solution.
This is some C programming
Great! That's what I do for a living. At least I know how to do that! Hey, I should have thought of this idea!
and might require some planning and desigining of the different interfaces to facilitate this kind of dispatch technique but it will for sure pay of in the long run, and make your library even usable in earlier LabVIEW versions, as well as VB etc. without tricky dynamic loading in the high level programming environment.
Ah, see how much I don't know in LabVIEW? I didn't know this was a new feature...
Thank you for the great idea.
Batya Perlman

JSF jars living in Tomcat shared/lib (not)

When I move the set of jars for JSF from the webapp/WEB-INF/lib up into tomcat's shared/lib, I get this error:
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When these libraries are in shared/lib, the
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I don't know Tomcat well enough to know if there's a
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Shared memory segment: function not implemented

Hi!
I tried to install Oracle8 on a dual pentium II / 233 system
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null

Hey, I ran into this problem too. Look and see if any db
processes failed to die last time you stopped oracle. I found a
ps_mon daemon still going when the database was down. I killed
it, restarted the database and everything was fine.
StE (guest) wrote:
: Frank Schmitt (guest) wrote:
: : ORA-27125: unable to create shared memory segment
: : Linux Error: 38: Function not implemented
: : create database "ORCL"
: : Compiled new kernel, rebooted, verified that the right kernel
: : was loaded, installed oracle new, but it still doesn3t work.
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null

After having updated the software on my apple tv, i cannot set up home sharing on it (let alone itunes!) simply, the apple tv does not recognise my apple id and password anymore

i have updated the apple tv software (on one apple tv, ihave 2) after having used for 2 years withou any problem.
i tried to log in again to watch movies already purchased but i cannot. the itunes store is not available and the home sharing does not recognise my id and password. on my pc i have alsoupdate to the latest software my itunes.
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Hi Everyone,
hope this message finds you all in time. The recent Apple TV update 5.1 is terrible. Apple knows it is which is why (thankfully for some relentless user -I have no idea who but I believe it was under threat) they have allowed to sign 5.0.2 again which means you can downgrade your Apple TV 2 and 3 to a 5.0.2 version via iTunes. Who knows how long they will keep the window open but I have downgraded my ATV early this morning. I couldn't post this earlier because I was out all day but I am doing it now.
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Desktop sharing function not optional!

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Hi,
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9:01 PM Wednesday; July 18, 2012
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A function DrawGeometry not recognised in WPF

Hello
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76
28
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Please remember to mark all helpful posts that answers your question(s), and only these, as answer and please start a new thread if you have a new question.

LABVIEW.LIB was not called from a LabVIEW process when creating unit tests

We are developing a DLL to be integrated in LabVIEW using CLFs. So far we have the system working, but we wanted to create some unit tests in C as part of our release process. The problem is that when I link labview.lib in VS C++ and then call the EXE generated I get an error saying: "LABVIEW.LIB was not called from a LabVIEW process". As mentioned in http://zone.ni.com/reference/en-XX/help/371361J-01/lvexcodeconcepts/debug_dlls_and_dll_calls/:
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Hello SaraGr,
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1. What is the LabVIEW version that you are using?
2. Does your DLL uses Serial Compatibility VIs? If so, try using your development on NI-VISA instead of Serial.
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4. Be sure to include the header files in your program, like extcode.h. Please follow this white paper to link labview.lib to your program, or follow the Alternate Method.
Regards,
Daniel REDS
RF Systems Engineer
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Dll Shared lib functions not recognised?

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