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NI-DMM 2025 Q2 Known Issues

Created Apr 21, 2025

Overview

This document contains the NI-DMM known issues that were discovered before and since the release of NI-DMM 2025 Q2. 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.

Bug Number

Legacy ID

Description

Details
1210589, 2256290

NI-DMM devices may fail under Linux kernel DMA remapping

Attempts to use NI-DMM devices may fail on Linux kernels that have enabled DMA remapping.  The Linux kernel logs will contain errors similar to the following:
DMAR: [DMA Read NO_PASID] Request device [06:00.0] fault addr 0xb8441000 [fault reason 0x06] PTE Read access is not set
Linux distributions that enable DMA remapping by default include Ubuntu 22.04 with kernel 6.8 or higher and Ubuntu 24.04.

Workaround:

Modify the Linux kernel DMA remapping configuration as outlined in https://www.ni.com/r/iommu-linux.

Reported Version:

NI-DMM: 20.1

Resolved Version:

N/A

Added:

Sep 27, 2024
2882143

niDMM Initialize VIs may fail with an error when called in an NI LabVIEW Real-Time Startup VI

When a LabVIEW VI is configured as the Startup VI on a LabVIEW Real-Time target, if an NI-DMM session is initialized before the instrument's driver has fully loaded (e.g. by calling "niDMM Initialize with Independent Channels" as the first VI), it may return error -1074118656 ("Device was not recognized. The device is not supported with this driver or version.").

Workaround:

Add a wait of approximately 5-10 seconds prior to calling the niDMM Initialize VI.

Reported Version:

NI-DMM: 2023 Q1 | NI-DMM: 2023 Q3 | NI-DMM: 2023 Q4 | NI-DMM: 2024 Q4 | NI-DMM: 2025 Q1

Resolved Version:

N/A

Added:

Apr 4, 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.

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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).