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NI-Serial 21.5 Known Issues

Created Jun 22, 2023

Overview

This document contains the NI-Serial known issues that were discovered before and since the release of NI-Serial 21.5. 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.

Bug Number

Legacy ID

Description

Details
1377894

NI-VISA does not support Serial DTR/DSR flow control on Linux

The DTR/DSR flow control mechanism is not supported in a standard way by the Linux Operating System.

Workaround:

There is currently no known workaround for this issue.

Reported Version:

NI-VISA 19.0

Resolved Version:

N/A

Added:

Oct 20, 2021
1347185

NI-VISA doesn't support Serial DTR controlled transceiver modes on Linux

RS-485 Serial ports typically support several transceiver modes. However, NI-VISA only supports the following two modes on Linux:
  • 4-Wire
  • 2-Wire Auto

Workaround:

There is currently no known workaround for this issue.

Reported Version:

NI-VISA 19.0

Resolved Version:

N/A

Added:

Oct 20, 2021
1956417

NI-Serial Fails to Install on Linux Kernel 5.13 or Later with Fatal Error

When installing certain NI drivers onto a Linux system using kernel version 5.13 or later, the installation fails with an error about not finding all the dependencies it needs such as:

/var/lib/dkms/nikal/21.5.0f129/build/nikal.c:32:16: fatal error: config/modversions.h: No such file or directory

Workaround:

Reattempt the installation after adding modversions.h to the kernel headers for your current system kernel. For example:
sudo touch /usr/src/linux-headers-$(uname -r)/include/config/modversions.h

Reported Version:

NI-Serial 21.5

Resolved Version:

NI-Serial 2023 Q2

Added:

May 10, 2022

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).