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How can I get the resource descriptor of a session initiated with an IVI step?

Hi!

I develop test sequences where I use IVI step. I would like to develop a sequence to allow the user to send a GPIB message by creating a sequence which calls a VI Labview containing VIs VISA Write and Read. But the session has already been initiated by an IVI step.
For that purpose, I would like to get the resource descriptor to pass it to the VI.

I have tried to fill resource descriptor fields with resource name ("GPIB0::5::INSTR") and session number (obtained with the IVI step get attribute and attribute: "IVI_ATTR_IO_SESSION") but they are not recognized by Labview and a proxycaller error is generated.

Has someone any idea to solve this problem...

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