Unable to locate component

[rohrdt]

I have a piece of equipment which came with some DLLs to control it.  I want to call these DLLs through LabVIEW,

I used a Call Library Function Node in the block diagram and browsed to one of the DLLs with a function to initialize the equipment.

When I run the vi I get the error:

LabVIEW: LabVIEW.exe Unable to locate component.

  "This application has failed to start because psdkdll.dll was not found.  Re-installing the application my fix the problem."

I checked and the psdkdll.dll is in the same directory as the DLL configured in my Call Library Function Node.

How can I link all of these DLLs to the high level DLL in my Call Library Function Node?

I read the Using External Code chapter in the LabVIEW manual.  So I think I have all of the correct data types going into

the Call Library Function Node.

[Andy F.]

rohrdt,

So to clarify, you are calling a dll (A.dll) that apparently calls the psdkdll.dll, which cannot be found.  Is this correct?  If so, there are a few things that you could try.  If you are familiar with any other programming language, I would suggest trying to call the dll from that language, just to check to see if it is a dll issue or a LabVIEW issue.  You could also try to copy the psdkdll.dll file and put it in the C:\Windows\System32 folder.  It may just be a relative path or linking issue with the dll. 

Out of curiosity, are you using NI-VISION at all?  I did a Google search for the psdkdll.dll and found that it is a utility file that is included with Canon cameras.  If this is the case you may be able to use a NI driver to access the camera.

Hope this helps!

Andy F.

[rohrdt]

Hi Andy F.

Thanks for your response. 

"So to clarify, you are calling a dll (A.dll) that apparently calls the psdkdll.dll, which cannot be found.  Is this correct?"

This is exactly what I am trying to do.  I ended up copying all of the dlls into the same directory as the main vi that I am using.

The error went away, but I am still not sure if I am actually communicating with the camera yet.

I would like to try the dlls out in a different language, but I am not familiar with one.

"Out of curiosity, are you using NI-VISION at all?"

I am not using NI-VISION, I was hoping to be able to do this without buying anying other software.