This document contains the NI-DAQmx known issues that were discovered before and since the release of NI-DAQmx 2026 Q3. 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.
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Bug Number |
Legacy ID |
Description |
Details |
|---|---|---|---|
| 196440 | 698239 |
Blank Test Panel will display for NI-9469 used in CompactRIO with DAQmx controllers.If you click the *Self Test* button in NI Measurement & Automation Explorer (MAX) for the NI-9469, a Test Panel will open with nothing displayed. The *Self Test* button in NI MAX is incorrectly enabled for this module. The blank Test Panel does not imply anything negative about the NI-9469 functionality. Workaround: There is currently no known workaround for this issue. This issue does not affect module functionality.
|
Reported Version: NI-DAQmx: 18.1 Resolved Version: N/A Added: Jun 25, 2018 |
| 255732 | 742510 |
USB X Series Devices Do Not Work as SCXI Controllers in NI-DAQmx 17.6 and LaterThe USB-6341, USB-6343, USB-6351, USB-6353, USB-6356, USB-6361, USB-6363, and USB-6366 are unable to be configured as a controller for SCXI devices in NI-DAQmx 17.6 and later. The USB-6346 and USB-6349 are unable to be configured as an SCXI controller in any release of NI-DAQmx. Workaround: Use either non-USB X-Series devices or revert to a version of DAQmx prior to 17.6
|
Reported Version: NI-DAQmx: 17.6 Resolved Version: N/A Added: May 2, 2020 |
| 661551 |
NI cDAQ-918x/919x Works Incorrectly if Path Includes Non-ASCII (Multi-Byte) CharactersThe NI cDAQ-918x/919x might not function correctly if NI-DAQmx is installed in a path with non-ASCII (or multi-byte) characters. This issue most commonly affects NI-DAQmx installations on Korean, Japanese, and Chinese versions of Windows.
Workaround: If your NI-DAQmx installation path contains non-ASCII characters, uninstall NI-DAQmx and other NI application development software and then reinstall your software to a path without non-ASCII characters. |
Reported Version: NI-DAQmx: 9.2 Resolved Version: N/A Added: Apr 23, 2021 |
|
| 435149 |
Aborting Single-Point Reads and Writes in LabVIEWSingle-point reads and writes do not respond to the Abort Execution button in LabVIEW.
Workaround: There is currently no known workaround for this issue. |
Reported Version: NI-DAQmx: 9.0.1 Resolved Version: N/A Added: Aug 15, 2009 |
|
| 978390 |
Error -200485 When Running Localized Imported TaskImporting an NI MAX configuration that includes NI-DAQmx tasks with non-English names will cause Error -200485 when running the saved task.
Workaround: Rename the task to only include English characters or recreate the task entirely.
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Reported Version: NI-DAQmx: 20.1 Resolved Version: N/A Added: Apr 23, 2021 |
|
| 1114653 |
Trying To Register DAQmx Software Events When a Task is Running Leads to CrashRegistering NI-DAQmx software events after a task has started causes LabVIEW to crash.
Workaround: Register all your NI-DAQmx software events prior to starting the task.
|
Reported Version: NI-DAQmx: 19.1 Resolved Version: N/A Added: Apr 23, 2021 |
|
| 1166757 |
Error When Acquiring from NI-DAQmx Hardware on Ubuntu systems on AMD Ryzen CPU with DMA remapping (IOMMU) enabledProcessors with DMA remapping (IOMMU) enabled may cause errors and failure to acquire data from DAQ devices.
Workaround: Turn off IOMMU DMA remapping. |
Reported Version: NI-DAQmx: 20.1 Resolved Version: N/A Added: Apr 23, 2021 |
|
| 1421795 |
Finite Buffered Event Counting operation using USB-6343 intermittently fails with buffer overflow error (-200222)A Finite Buffered Event Counting operation with USB-6343 can intermittently produce a Buffer Overflow error (-200222).
Workaround: There is currently no known workaround for this issue. |
Reported Version: NI-DAQmx: 20.1 Resolved Version: N/A Added: Apr 23, 2021 |
|
| 1702879 |
Applications built against recent NI-DAQmx .NET API versions will not run on a system with NI-DAQmx 21.3NI-DAQmx 21.3 does not install publisher policy files for versions 20.1, 20.7 and 21.0, even though it is fully backwards-compatible with these versions.
Workaround:
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Reported Version: NI-DAQmx: 21.3 Resolved Version: N/A Added: Oct 21, 2021 |
|
| 1795745, 2281142 |
LabVIEW applications that allocate memory using nipalk.sys may occasionally have bugcheck (Blue Screen) errorsA customer has reported that one of their LabVIEW-based applications causes occasional bugcheck (Blue Screen of Death--BSoD) errors. The crash dump stacks vary, the involved process varies (nipalsm.exe, 'Customer Application'.exe), and the reported types vary (SYSTEM_SERVICE_EXCEPTION, ATTEMPTED_WRITE_TO_READONLY_MEMORY). However, all the observed errors involve nipalk.sys and they all seem to involve memory allocation. The error is observed only when the application initializes access to NI-DAQmx for the first time during an OS session. If the application is able to initialize successfully, the error is not observed while the application executes. The root cause of this error is currently unknown. Workaround: There is currently no known workaround for this issue. |
Reported Version: NI-DAQmx: 19.1 | NI-PAL: 19.0 Resolved Version: N/A Added: Feb 14, 2023 |
|
| 2858891 |
NI Drivers may fail under Linux kernel DMA remappingAttempts to use NI devices may fail on Linux kernels that have enabled DMA remapping. The Linux kernel logs will contain errors similar to the following: 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 Linux Device Drivers: 2020 | NI-DAQmx: 20.1 Resolved Version: N/A Added: Nov 4, 2024 |
|
| 3183214 |
First Sample Timestamp property returns incorrect valueWhen synchronizing multiple DAQmx tasks with different sampling rates, the reported First Sample Timestamp attribute/property may be inaccurate. However, the running tasks are in fact synchronized. Impacted Instrument model: cDAQ-9183, cDAQ-9185, cDAQ-9187, cDAQ-9189
Workaround: There is currently no known workaround for this issue. |
Reported Version: NI-DAQmx: 2024 Q3 Resolved Version: N/A Added: Oct 7, 2025 |
|
| 3524646 |
The PXIe-4311 Routes the Start Trigger through the Wrong Terminal During SynchronizationWhen setting the DAQmx Trigger SyncType property, the PXIe-4311 will route the start trigger through the it0/StartTrigger terminal instead of the ai/StartTrigger terminal. This issue will also affect synchronization examples that use the ai/StartTrigger terminal to share triggers between primary and secondary tasks.
Workaround: Use the it0/StartTrigger terminal as the shared start trigger terminal when performing a synchronization. The following is an example alternative terminal: /PXI1Slot2/it0/StartTrigger
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Reported Version: NI-DAQmx: 2026 Q2 Resolved Version: N/A Added: Jun 9, 2026 |
|
| 3234446 |
The PXIe-4311 is Missing Events at the End of a Finite Acquisition TaskThe last event is missing for finite acquisition tasks that register an Every N Samples event or a Signal event.
Workaround: Combine your Every N Samples and Signal events with a Done event to capture the end of the acquisition.
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Reported Version: NI-DAQmx: 2026 Q2 Resolved Version: N/A Added: Jun 9, 2026 |
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Ethernet CompactDAQ Chassis Streaming Causes Host System to Hang When NI Services Are Automatically Restarted on Ubuntu Server 24.04 through "needrestart" utility
When NI-DAQmx streaming tasks are running with cDAQ-9187 or cDAQ-9183, restarting NI services automatically during an active streaming session can cause the host system to hang. This issue has been reported on Ubuntu Server 24.04 system that uses the needrestart utility that was configured to automatically restart services after package updates. If NI services are restarted while NI-DAQmx streaming task is running on Ethernet CompactDAQ chassis, driver threads maybe blocked in an uninterruptible sleep (D-state). As a result, the host system becomes unresponsive and must be rebooted to recover.
Workaround: Disable automatic restarts of NI services by configuring the
needrestart utility to exclude them. Alternatively, ensure that NI services are only restarted manually during a planned maintenance window when no DAQmx Ethernet streaming tasks are active. |
Reported Version: NI-DAQmx: 2025 Q3 | NI-DAQmx: 2025 Q4 | NI-DAQmx: 2026 Q1 Resolved Version: N/A Added: Jun 29, 2026 |
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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