UID Property

LabVIEW 2018 Help

Edition Date: March 2018
Part Number: 371361R-01
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Short Name: UID

Requires: VI Scripting

Class: GObject Properties

To Use: Create a property.

Returns the unique identifier (UID) for the object. UIDs are identifiers for LabVIEW objects and are always unique within the same VI. Inspect the UID of an object to verify that it is the exact object that you want to manipulate.

A UID is always associated with the same object, even after you save the VI. However, if you delete an object, LabVIEW might assign the UID for that deleted object to a different object in the future. To detect this situation and ensure each UID refers to the object that you expect, check the Class Name property or Label property of the object in addition to the UID.


The following table lists the characteristics of this property.

Data type
PermissionsRead Only
Available in Run-Time EngineYes
Available in Real-Time Operating SystemYes
Settable when the VI is runningNo
Loads the front panel into memoryNo
Need to authenticate before useNo
Loads the block diagram into memoryNo
Remote access allowedYes


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