Labview dll calls fails while Labview Run time is already running

[feriale]

Hi All

I developed a DLL by Labview 7.1 which writes a simple file and this DLL is loaded dynamically into another DLL.

Furthermore the latest DLL is invoked by using some VI Panels.

So the scenario is this one

Labviwe Panels --> DLL_A --> WriteFile.dll(built by Labview )

Now it's seems that if Labview is running and I am going to call the WriteFile.dll through the DLL_A nothing happpens.

So I tried to skip Labview and to create a simple test application to check WriteFile.dll and I discovered that Without loading Labview this WriteFile.dll works fine.

What can be the problem? It's seems some problem occurs with run-time engine conflicts.

Please help me

[jjp377]

Hi,

You might want to post this question to the LabVIEW forum.

[Loura]

Hi,

take a look at the example at the link:

http://zone.ni.com/devzone/cda/epd/p/id/1697 

Does it works on your machine? If so, check the difference between this example and your vi.

I hope this helps

Clara

[feriale]

Hi Clara

Yes It's working but I don't think CDF_Example.dll is built under labview.

The problem I have is:

1) Built VI and create its DLL -->DLL_1 ( this one write only a file )

2) Open Labview Panel -->calls DLL_2 that calls DLL_1(see above)

3) the DLL1 does not work

But If I run the DLL_1 from normal MFC console Application( Labview 7.1 run time engine not loaded yet ) the DLL_1 work.

Thanks

Alex