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Get IVI Device Session (G Dataflow)

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Last Modified: September 26, 2018

Retrieves an IVI instrument session for an IVI switch that is being managed by Switch Executive. The retrieved session reference can be used to access instrument-specific functionality through the instrument driver.

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Note  

Use caution when using the session reference. Calling nodes on an instrument driver can invalidate the Switch Executive configuration and cache. You should not use the retrieved session reference to make or break connections or modify the configuration channels, as doing so can cause undefined, and potentially unwanted, behavior.

Programming Patterns

When you finish using the IVI device session, call Release IVI Device Session.

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session in

Handle that identifies your Switch Executive virtual device session previously allocated by Open Session.

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error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

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IVI logical name

IVI logical name of the IVI switch for which to retrieve an IVI session.

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session out

Reference to your virtual device session to wire to the next node.

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error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.
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IVI session out

Reference to your IVI session to wire to the next node.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application

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