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LabVIEW OPC UA Toolkit 2025 Q4 Known Issues

Created Oct 16, 2025

Overview

This document contains the LabVIEW OPC UA Toolkit known issues that were discovered before and since the release of LabVIEW OPC UA Toolkit 2025 Q4. Known issues are performance issues or technical bugs that NI has acknowledged exist within this version of the product.

Not every issue known to NI appears on this list; it is intended to show the most severe and common issues that you may encounter and provide workarounds when possible. Other technical issues that you may encounter could occur through normal product use or system compatibility issues. You may find more information on these issues in NI’s Product Documentation, Knowledgebase, or Community; see Additional Resources.

Glossary of Terms

Bug Number	Legacy ID	Description	Details
		Memory Leak in OPC UA Start/Stop Nodes During Repeated Loop Execution A memory leak is observed with OPC UA toolkit, when the OPC UA Start and Stop nodes are repeatedly executed inside a loop. This issue occurs where the Start and Stop nodes are called continuously, leading to a consistent increase in memory usage over time without being released. Steps to Reproduce: Place OPC UA Start and Stop nodes inside a loop. Run the loop continuously for an extended period. Observe memory usage via Task Manager or any memory profiling tool. Workaround: Avoid repeated Start/Stop in loop close and relaunch the application after a defined memory threshold is crossed.	Reported Version: LabVIEW OPC UA Toolkit: 2025 Q3 Resolved Version: N/A Added: Jul 10, 2025

Bug Number

Legacy ID

Description

Details

Memory Leak in OPC UA Start/Stop Nodes During Repeated Loop Execution

A memory leak is observed with OPC UA toolkit, when the OPC UA Start and Stop nodes are repeatedly executed inside a loop. This issue occurs where the Start and Stop nodes are called continuously, leading to a consistent increase in memory usage over time without being released.

Steps to Reproduce:

Place OPC UA Start and Stop nodes inside a loop.
Run the loop continuously for an extended period.
Observe memory usage via Task Manager or any memory profiling tool.

Workaround:

Avoid repeated Start/Stop in loop
close and relaunch the application after a defined memory threshold is crossed.

Reported Version:

LabVIEW OPC UA Toolkit: 2025 Q3

Resolved Version:

N/A

Added:

Jul 10, 2025

Final Time Issue Listed

Issues found in this section will not be listed in future known issues documents for this product.

There are currently no issues to list.

Additional Resources

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Glossary of Terms

Bug ID - When an issue is reported to NI, you may be given this ID or find it on ni.com. You may also find IDs posted by NI on the discussion forums or in KnowledgeBase articles.
Legacy ID – An older issue ID that refers to the same issue. You may instead find this issue ID in older known issues documents.
Description - A few sentences which describe the problem. The brief description given does not necessarily describe the problem in full detail.
Workaround - Possible ways to work around the problem.
Reported Version - The earliest version in which the issue was reported.
Resolved Version - Version in which the issue was resolved or was no longer applicable. "N/A" indicates that the issue has not been resolved.
Date Added - The date the issue was added to the document (not the reported date).