LabVIEW 2025 Cannot Switch Class Property Node Write to Read Dynamic Accessors

Updated Mar 11, 2026

Issue Details

In LabVIEW 2025, a software issue prevents users from switching a LabVIEW Class Property Node from Write mode to Read mode when the property is implemented using dynamic accessor VIs.


When creating a New VI for Data Member Access for a LabVIEW class, select Numeric, Read and Write, Dynamic Accessor, and Make available through property nodes = True, as shown in the screenshot.




When placing this class in a new VI and creating a property node for the class, right‑clicking the property node shows that Change to Read and Change All to Read are grayed out.


Solution

The workaround is to: 

Create the Read Accessor VI first

Then create the Write Accessor VI

A fix is planned in LabVIEW 26.3.0.163-0+d163