Deploying QT Application with NI-VISA dll

[christopher_dreher]

Hello,

i got a problem deploying a application written in QT4.6/C++ using the NI-VISA libraries.

If the destination machine has the NI-VISA package installed all is fine and the application runs fine.

But i wish to deploy the application with the NI-VISA dlls without installing the NI-VISA package.

I used a dependency walker to find out which dynamic libraries must be available. The result was

VISA32.DLL

NIVISV32.DLL

NISPYLOG.DLL

MSVCR90.DLL

Now when i try to run the application on a destination machine it aborts with "The application failed

to initialize properly (0xc0000142)"

The error indicates a problem loading the shared libraries.

Does anybody know a solution for this?

greetings chris

[Justin_E]

Hey Chris,

I'd suggest you install the VISA Run-Time Engine to the machine you're deploying your application to. The Run-Time engine has a much smaller footprint than the entire VISA driver, if that's what you're concerned about. You'll need either the Run-Time or the full driver on that machine to be able to use those DLLs properly. Here's a link to the VISA 4.6.2 run-time : http://joule.ni.com/nidu/cds/view/p/id/1606/lang/en 

[wleichtfried]

Hello,

I would like to use NI-VISA with Qt Creator (1.3.1)/Qt4.6.1.

I include visa.h.

My code looks like this:

    ViSession defaultRM, vi;
    ViStatus status;
    char buf [256] = {0};


    /* Open session to GPIB device at address 22 */
    status = viOpenDefaultRM (&defaultRM);

But when I try to compile I get the following error:

 undefined reference to `viOpenDefaultRM@4'

Could you help me get started with using visa with qt creator (mingw compiler).

Thanks,

Wilhelm