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Get Next Interchange Warning (G Dataflow)

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Last Modified: January 17, 2018

Returns the interchangeability warnings associated with the IVI session. This node retrieves and clears the oldest instance in which the class driver recorded an interchangeability warning. Interchangeability warnings indicate that using your application with a different instrument might cause different behavior.

Programming Patterns

To guarantee that this node only returns those interchangeability warnings generated after calling the niSwitch Reset Interchange Check node, clear the list of interchangeability warnings by repeatedly calling this node until no interchangeability warnings are returned. If you are not interested in the content of those warnings, call the niSwitch Clear Interchange Warnings node.

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session in

Control that identifies a particular NI-SWITCH session established with the niSwitch Initialize With Topology node, the niSwitch Initialize With Options node, or the niSwitch Initialize node.

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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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session out

Indicator that identifies a particular NI-SWITCH session established with the niSwitch Initialize With Topology node, the niSwitch Initialize With Options node, or the niSwitch Initialize node and used for all subsequent NI-SWITCH calls.

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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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interchange warning

Next interchange warning for the IVI session. If there are no interchangeability warnings remaining for the session, this output returns an empty string.

Interchangeability Checking

NI-SWITCH performs interchangeability checking when the Interchange Check property is set to TRUE.

The node returns an empty string for interchange warning if no interchangeability warnings remain for the session.

In general, NI-SWITCH generates interchangeability warnings when a property that affects the behavior of the switch is in a state that you did not specify.

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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