Rif.: (My Labview built executable) has encountered a problem and needs to close.

[gdecker]

I'm looking into the Call Library function.  When I put the dll that I'm using in the activeX invoke node into the call library function, I get less than half of the available function calls.  What gives?

[gdecker]

Incidentally, here is the VI that's causing the problem.

[gdecker]

The error message I get from the Visual C++ debugger I have installed on the target machine is

"Unhandled exception in your_vi.exe (BQ80XRW.ICX): 0C0000005: Access Violation."

There is no problem with this object when it's invoked by other software.  I have VB6 code that runs perfectly well without issue.

[RTSLVU]

Here is a bunch of posts with the same or simmilar error message...

http://forums.ni.com/t5/forums/searchpage/tab/message?filter=location&location=forum-board%3A170&q=0...

Maybe there is a soution in there someplace

[gdecker · Accepted solution]

Okay, problem solved.

The issue was the fact that the activeX object (BQ80XRW.OCX) and dynamic link library (BQ80XUSB.dll) that I was invoking in my VI did not have the permissions set correctly in the destination computer.  Basically, since I did not have Labview installed on the target machine, those objects denied access to programs developed in labview.  I never had a problem with VB6 executables because VB6 is installed on the target computer.

Texas Instruments provided me with an executable that puts the DLL into developer mode, and after updating IVI and the device drivers to account for some GPIB errors, the program now opens and runs as expected.

[penguinjazzy]

Hello Gdecker

   I am trying to control EV2300 in LabVIEW via dll but do not know how to start.  May you share the code of how to control to me if possible ?   Many thanks

Sincerely

Jesse

[auimb]

I am trying to control EV2300 in LabVIEW but do not know how to start.
can you help me?

thank you

[rctrigger]

Hi there.

Can you share the Vi you used on communicating your EV2300 thru USB. I'm currently on a project with the same purpose but I'm having a hard time to do so...

Thanks in advance.

[ks30]

Rctrigger,

Given the fact that the EV2300 is third-party hardware, if you have specific questions regarding that hardware you should contact the manufacturer directly.

In general, however, when interfacing with third-party hardware the Call Library Function Node can be used to call shared libraries in LabVIEW. Please reference the following pages from LabVIEW 2015 help:

Calling Shared Libraries

http://zone.ni.com/reference/en-XX/help/371361M-01/lvexcodeconcepts/shared_libraries_dlls/

Configuring the Call Library Function Node

http://zone.ni.com/reference/en-XX/help/371361M-01/lvexcodeconcepts/configuring_the_clf_node/

Call Library Function Node

http://zone.ni.com/reference/en-XX/help/371361M-01/glang/call_library_function/

*NOTE: If you are not using LabVIEW 2015 then reference the help page for your specific version of LabVIEW.

If you have already implemented the Call Library Function Node and you are having trouble debugging calls to shared libraries the following help page outlines troubleshooting steps:

Debugging Shared Libraries and Calls to Shared Libraries

http://zone.ni.com/reference/en-XX/help/371361M-01/lvexcodeconcepts/debug_dlls_and_dll_calls/

Regards,

Kyle S.
Applications Engineer
National Instruments
ni.com/support