LabVIEW Crashes When Calling DLL

[Neeraj9001]

hi team;

            I am facing issue when i am calling a dll LabVIEW crashes. In my dll the functions i am calling it have many supported dlls. I tried with shared library node and tools>import>shared library(.dll) in both LabVIEW crashing. My dll file is in c++, and the functions i am exporting in visual studio, I am getting in lab-view. But after the parameter configuration, When i click OK. LabVIEW   not responding and crash without any error message. 

I am using visual studio 2019 And LabVIEW 2019.

Here i am attaching VS function calling code and export function code.

And i am placing all supported dlls in the same directory, Where the dll i am created using VS.

[wiebe@CARYA]

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@Neeraj9001 wrote:

But after the parameter configuration, When i click OK. LabVIEW   not responding and crash without any error message. 

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So it crashes when you click OK in the configuration?

Your screenshot seems to show the VI is running.

This is quite important... Please be precise and accurate.

[wiebe@CARYA]

If it hangs when you run the VI, I can only assume getDeviceSerialNumber() is hanging in the dll. Or instantiating Cam.

I don't see how functions that have no input parameters would fail, there's nothing wrong to configure.

Start with a function that doesn't do anything. Or maybe a MessageBox. If those work, the problem is in the DLL (or in the DLL when called from LabVIEW).

[Neeraj9001]

In the same dll, I tried with simple addition function it working fine.But it is not working for getdeviceserial number.

[Neeraj9001]

Hi sir;

           We are working on two systems, In one systems LabVIEW getting not responding when we click ok button. Another system when we run the vi LabVIEW not responding.

[wiebe@CARYA]

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@Neeraj9001 wrote:

Hi sir;

           We are working on two systems, In one systems LabVIEW getting not responding when we click ok button. Another system when we run the vi LabVIEW not responding.

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Not responding? Of a broken run arrow?

It's still not clear at all. You're showing a broken VI. That's not 'not responding', it's a pretty clear response.

If you can't run the VI a resource it missing or borken. It could be a 64 bit dll and 32 bit LabVIEW, or vice versa. Or the dll is missing a resource\dependency and can't be loaded. Or the function is missing.

If you can run the VI, and it hangs, something is wrong with the dll. As you have 0 parameters in, I think the problem is in the dll.

I never have seen LabVIEW hang when pressing OK in the configuration window, so I can't help you there. I guess it can happen if the dll uses DLL_PROCESS_ATTACH, DLL_THREAD_ATTACH, DLL_THREAD_DETACH, DLL_PROCESS_DETACH to call something it shouldn't.

[Neeraj9001]

I got the solution.

[wiebe@CARYA]

If you post it, you might help someone...

[Neeraj9001]