SystemLink 2021 R1 Known Issues

Overview

This document contains the SystemLink known issues that were discovered before and since the release of SystemLink 2021 R1. 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

211182

Using the browser navigation buttons does not correctly change a query

On pages with a query panel (Assets, Calibrated Assets, Reports, etc.), the browser back button does not work as expected. When a user presses the back button, the URL in the browser changes, but the filters do not.

Workaround:

Remove the filter using the X button next to the property selection field instead.

Reported Version:

SystemLink 19.5

Resolved Version:

N/A

Added:

Feb 27, 2020

1077209

Packages disappear from grid when viewed in Safari full screen mode

Package Repository application fails to display packages in the feed's detail view when done from Safari in full screen mode.


Workaround:

Use a different browser such as Chrome or take Safari out of full screen mode.

Reported Version:

SystemLink 2020 R3

Resolved Version:

N/A

Added:

Dec 10, 2020

1038431, 1379439

Stored test results can be sent to the incorrect server when client registration is changed while forwarding is in progress

If the store & forward plugin is already loaded and forwarding steps, it continues to forward to the original server connection even if the server is changed.  It will not switch servers while there are current transactions on disk and still successfully forwarding them.  Since simply switching the master does not invalidate the old API key, then if the server is still accessible, the forwarding plugin does not know that it should switch to the new master.

Workaround:

There is currently no known workaround for this issue.

Reported Version:

SystemLink 2020 R2

Resolved Version:

N/A

Added:

Dec 11, 2020

1350133

Windows login account cannot be used as TDM User Account

Logging into the Windows SystemLink servers with different user accounts can create issues with TDM services like DataFinder in case when one of these login accounts is also being used as SystemLink TDM User Account.

Workaround:

Assign a specific user/account to SystemLink TDM services.

Reported Version:

SystemLink 2020 R4

Resolved Version:

N/A

Added:

Apr 27, 2021

1411798

LabVIEW RT targets show "partially connected" status in Systems Grid due to failing http requests from the client when using self-signed certificates

The NI Web Server Configuration Utility is adding ipv6 addresses to the SAN of the certificate. This is causing http requests coming from the client to fail because of a known bug in urllib3: Connection fails via https when certificate contains IPv6 address in SAN · Issue #1269 · urllib3/urllib3 (github.com)

This breaks the RT target's ability to connect and publish data when using self-signed certificates because NI LinuxRT uses a version of urllib3 that does not contain the above fix.

Workaround:

To resolve the issue, navigate to the NI Web Server Configuration Utility and complete the following steps:
  1. Navigate to the HTTPS tab
  2. In the HTTPS settings section, expand the "Generate a new certificate" section
  3. Find the entry containing "::1" and hit the "Remove" button
  4. Click the "Generate and install" button and follow the remaining steps in the utility to generate a new certificate

Reported Version:

SystemLink 2021 R1

Resolved Version:

N/A

Added:

Apr 12, 2021

1420676

Custom NoSqlDatabase connection string does not allow lower case URL encoding

Setting a custom connection string in the NoSqlDatabase configuration requires any special characters to be URL encoded.  Using lower case characters within the URL encoding will cause the string to be incorrectly regarded as invalid.

Workaround:

Use only upper case characters within the URL encoding.  For example, %3d will be considered invalid, but %3D will work correctly.

Reported Version:

SystemLink 2021 R1

Resolved Version:

N/A

Added:

Apr 27, 2021

1422638, 1433322

[Analysis Automation] Manual approval of Analysis Procedures required after upgrade

When upgrading from a SystemLink version prior to 2021, existing procedures are not approved automatically.
However, existing and active tasks are still working, but cannot be edited and new tasks cannot be created, until the procedure has been approved.

Workaround:

Manually approve the according Analysis Procedures.

Reported Version:

SystemLink 2020 R4

Resolved Version:

SystemLink 2021 R1.1

Added:

Apr 27, 2021

1516963

Canceling a report or notebook execution causes the worker to stop functioning

Canceling a notebook execution from the Test Insights Report view causes the worker process to throw an exception, and it can no longer be used. There are 4 notebook execution workers by default, so if this happens multiple times, you will no longer be able to execute any notebooks or reports. In addition, reports in dashboards will no longer be updated.

Workaround:

Rebooting the server will restart the notebook execution workers and allow everything to work temporarily.

Reported Version:

SystemLink 2021 R1

Resolved Version:

SystemLink 2021 R2

Added:

Jul 9, 2021

1706828

DataFinder stopped because SL TDM Database Service crashed

Workaround:

There is currently no known workaround for this issue.

Reported Version:

SystemLink 2021 R1

Resolved Version:

SystemLink 2021 R1.2

Added:

Nov 24, 2021

1360973

Transport Layer Security (TLS) negotiation of SCHANNEL-based SystemLink clients with NI Web Server fails intermittently

When the NI Web Server is configured with a self-signed certificate, some installations seem to have issues with SystemLink clients failing to send HTTPS requests. Clients fail with a generic Secure Socket Layer (SSL) error even though the self-signed certificate on the server is valid, and correctly installed on the client. The client's browser and HTTP clients like cpprest correctly trust NI Web Server. But any .NET-based HTTP client using SCHANNEL will exhibit this behavior. When this happens, all targets registered to the server will fail in all sorts of strange ways, resulting in strange client-side behavior product wide.

We have determined that the behavior above is attributed to unusual TLS version negotiation within .NET Framework 4.6.2 itself, which configures SCHANNEL with unusual version negotiation behavior. Here is the Microsoft documentation explaining the problem: https://docs.microsoft.com/en-us/dotnet/framework/network-programming/tls#configuring-security-via-the-windows-registry. According to this documentation, the behavior was changed in .NET Framework 4.6.3, whereas NI SystemLink uses 4.6.2.

Workaround:

As per Microsoft documentation, there is a set of registry keys which force 4.6.2 version of .NET Framework to default to the OS-level TLS negotiation behavior. We have confirmted that applying the registry keys to affected targets fixes the problem. You can find the set of registry keys along with values to apply in this documentation from Microsoft - https://docs.microsoft.com/en-us/dotnet/framework/network-programming/tls#configuring-security-via-the-windows-registry


Please contact NI if you have trouble with the registry keys.

Reported Version:

SystemLink 2021 R1

Resolved Version:

N/A

Added:

Feb 28, 2022

2054336

Writing NaN to a Tag Can Cause a Tag Historian Service Crash

Applications writing to double tags with history enable can cause the Tag Historian Service to crash if the value written is not a number (NaN).

Workaround:

In your application writing tag values, include additional logic to filter NaN values prior to writing to the tag service.

Reported Version:

SystemLink 2021 R1

Resolved Version:

SystemLink 2022 Q1 Patch 3

Added:

Oct 28, 2022

2266174

SystemLink Client performance degradation over time

The SystemLink TrayApp on the client system starts a tcp-server in order to get job notifications. This mechanism enables pop-up notifications informing the current user that a job started/completed. This has to work for any user that can login to that system and for Windows Server we have to support the use-case of multiple users being logged-in simultaneously; each user has their own tcp-server on its own port.

The ports are persisted on the disk in this location: C:\ProgramData\National Instruments\Systems Management\NIMinionConfig\ports

Over time, this list may grow and will include users that are no longer active on the system. For each port that fails to connect, there is a 2 second timeout when attempting to connect. This results in delays of 2 seconds multiplied by the number of inaccessible ports for each job.

Knowledge Article associated with this issue: 

    Workaround:

    Manually delete the files corresponding to the users that are no longer logged in to that system.

    Reported Version:

    SystemLink Client 2020 R1

    Resolved Version:

    SystemLink Client 2022 Q1 Patch 4, SystemLink Client 2023 Q1

    Added:

    Mar 7, 2023

    2395617, 2435241

    TDM DataFinder Optimize Database function does not reduce database footprint when run after data is deleted from MariaDB

    In version of DataFinder Server Editions prior to 2014, executing the TDM DataFinder Optimize Database function would reduce the database footprint roughly proportional to the volume of records deleted from the database. This function could be used to help cleanup database after archiving old data. This does not function as expected when run after data is deleted from MariaDB

    Workaround:

    Setup multiple DataFinder instances and archive the entirety of the oldest database at a time, cycling through several instances to achieve desired volume of historical data storage.

    Reported Version:

    SystemLink: 19.5

    Resolved Version:

    N/A

    Added:

    Jul 27, 2023

    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).