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IVI .NET ResourceManager Find Method response incomplete?

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Hello,

 

I am trying to use the IVI .NET VISA SW components to interface my Instruments with MATLAB.

 

Using NI VISA Interface Control SW (and clicking "refresh"), I am able to list and see all the interfaces.

NI_VISA_Interactive_Control.JPG

And the NI IO Trace acquisition shows 8 interfaces :

NIOtrace_VISA_IC.JPG

I am interested in the last one in the traces: the instrument on GPIB...

 

Now, I am using the IVI .NET VISA SW component.

Running the Find() method of the GlobalResourceManager class, the result is different !

The number of detected interfaces is reduced to 6 instead of 8?

I have lost the GPIB ones, unfortunately.

 

I am using : Ivi.Visa.GlobalResourceManager.Find('?*') or Ivi.Visa.GlobalResourceManager.Find() - with same result.

And when running this line, the NI IO trace shows:

NIOtrace_IVI_NET.JPG

 

Only serial interface are listed here and no longer GPIB ones.

What is the difference between what is done by the NI VISA interactive control SW and the ResourceManager.Find() method I am trying to use?

Shall I do something different, what am I doing wrong?

 

Thank you in advance for your help and advice.

Best regards,

 

Laurent


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