Failed to Load or Create a Probe in an OPC UA Refnum in LabVIEW Real-Time

Updated Feb 24, 2025

Reported In

Software

  • LabVIEW Real-Time Module
  • LabVIEW OPC UA Toolkit
  • LabVIEW

Issue Details

  • When running my LabVIEW Real-Time application and trying to create a probe on an OPC UA Refnum wire I am getting the following error. Why is this happening?

Failed to Load or Create a Probe

Solution

The Failed to Load or Create a Probe error when probing an OPC UA Reference in the LabVIEW Real Time environment is a bug. As a workaround to probe an OPC UA Reference, you can use a Custome Probe. For this:

  1. Right-click on the OPC UA Reference wire
  2. Select Custom Probe>>New and give any preferred name
  3. Save the VI

After this procedure when you click on wire to add a probe it will add the custom probe and the window will open without throwing any error message.

Additional Information

When bundling the OPC UA Reference in a cluster and probing the cluster the error message will not appear, however there will be a No Debug info message displayed in the probe window caused by this bug.