LabVIEW DLL redeclaration errors

[Slowpoke]

Hello all,

I have created a LabVIEW (8.2) DLL that I want to call from LabWindows CVI (8.0).  I have added the required header and library files to my LabWindows project per instructions.  When I attempt to compile I get the type redeclaration errors described elsewhere in other threads.  I have removed all references to the native LabVIEW data types in my DLL VIs. 

It is my understanding that I should be able to compile the project with the "extcode.h" commented out in the library header file, but then I get project link errors to the DLL functions when I try to call them.  What's going on?

Slowpoke

[Gavin F]

Hi Slowpoke,

Can you post a simple version of your VI and C code, so I can check out why this may be happening?

[Slowpoke]

Hi Gavin,

Thank you for responding.  I believe I've solved my original problem; I had forgotten to move the .dll file into the same directory as the LabWindows dbg.exe file.  Butn now I have a different problem. 

I've included a DAQmx task in my DLL project.  When I build the DLL I add that VI to the list of exported VIs, which gives me a void function with no arguments.  However, when I try to call the function from my LabWindows program it doesn't run the VI.  Does this mean I will have to start the task VI with another VI containing a call by reference node, or is something else the issue? 

It might be better if I addressed this issue in another thread.  If so, thanks again!

Slowpoke

[Gavin F]

Hi Slowpoke,

I'm not sure why this would be happening from CVI.  You will get faster response in a LabVIEW forum, but I can look into this.

[Slowpoke]

Hi Gavin,

I appreciate it but that won't be necessary.  Nothing but a mild case of noobitis (mine). 

Thanks!

Slowpoke 

[Slowpoke]

Oops.  Spoke too soon.  I could still use some help on this issue.

Thanks,

Slowpoke

[Slowpoke]

Nope, still noobitis.  Sorry!

Slowpoke