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TestStand 2026 Q3 Bug Fixes

Created Jul 29, 2026

Overview

The following items are notable issues fixed between the release of TestStand 2025 Q3 and TestStand 2026 Q1, including additional patches and service packs. If you have an issue ID, you can search this list to validate that the issue has been fixed. This is not an exhaustive list of issues fixed in the current version of TestStand.

Bug Number

Legacy ID

Description

Details
3697936

Higher pre load times experienced when loading TestStand sequences

Preload time is slower than expected for large TestStand sequences that repeatedly call the same VI when that VI resides within a class hierarchy inside a PPL (Packed Project Library). Although caching should occur after the initial load, subsequent loads still show longer‑than‑expected delays.

  • A noticeable load delay occurs when multiple steps repeatedly invoke the same VI.
  • Preload time improves after opening the Specify Module dialog for the affected step that calls the repeatedly used VI.

    Workaround:

    Add an ActiveX step to the SequenceFileLoad callback and configure it to call LabVIEWModule.LoadVIInfo for the module VI that is invoked multiple times.
    Please note that you must call LabVIEWModule.LoadVIInfo for all VIs that are loaded repeatedly within your sequence file.
    Reference to Help Doc -

    Reported Version:

    TestStand: 2023 Q4 | TestStand: 2024 Q4 | TestStand: 2025 Q2 | TestStand: 2025 Q3 | TestStand: 2026 Q1

    Resolved Version:

    N/A

    Added:

    Feb 5, 2026
    3770347

    Operator Access Not Restricted in Run-Time Error Dialog

    The TestStand Run-Time Error dialog does not correctly enforce operator-level access restrictions.
    For users with the Operator role, all options except Run Cleanup should be disabled.
    This issue bypasses expected role-based access control and can allow unintended execution during runtime

    Workaround:

    Override the callback to display a custom runtime error dialog that includes only the required options.

    Reported Version:

    TestStand: 2021 SP1 | TestStand: 2022 Q4 | TestStand: 2023 Q4 | TestStand: 2024 Q4 | TestStand: 2025 Q2 | TestStand: 2025 Q3 | TestStand: 2026 Q1

    Resolved Version:

    TestStand: 2026 Q3

    Added:

    N/A

    Additional Patch Information

    Installing some patches may require certain additional steps or considerations. Please refer to the following table for more information about patches for this release.

    These patches currently do not have any special instructions.

    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).