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Version: 4.4

Release notes

4.4.0​

Highlights
  • New functionality for the File Transfer service: Symbolic link support.
  • When updating to version 4.4.0 of the File Transfer service, both Upstream and Downstream services must be updated at the same time.

Summary​

The DD Engine v4.4.0 release includes new functionality to the File Transfer service, such as symbolic link support and the option to remove backed-up files on service startup, as well as bug fixes.

Components​

The DD Engine release includes the following components:

  • DD Engine firmware:
    • Installer
    • Upgrade
  • Services:
    • File Transfer
      • SFTP
      • SMB
      • NFS
    • HTTP
    • MQTT
    • OPC UA
    • TCP
    • UDP

DD Engine​

Improvements​

The following improvements are included in this release:

  • Updated the DD Manager UI.
    • Replaced header tabs with a sidebar and changed the look and layout of the Overview and Settings pages.
    • Updated the look of the Features and Service configuration UI.
  • Improved error reporting in the DD Manager UI while adding LDAP groups.
  • Improved behavior of active DD Manager sessions when Access Control is changed from enabled to disabled in Local admin.
  • Improved logging during DD Engine startup.
  • Updated Third-party dependencies.

Bug fixes​

The following bugs have been solved in this version:

System​
  • Fixed an error when attempting to set a Forward Error Correction value over 200.
  • Fixed an error where, during a rollback of a failed firmware upgrade, the DD Manager from the upgraded version was temporarily reachable, until the rollback was finished.
  • FW upgrade files can no longer be selected while uploading service files to the device.
  • Service files can no longer be selected while uploading firmware upgrade files to the device.
  • Fixed an issue where the DD Manager UI would sometimes report an error during a Firmware Upgrade, even if the upgrade was successful.
  • Fixed an issue where leaving a browser open with the DD Manager running could hit the API request limit, resulting in a block of new API requests for 60 seconds.
Access control​
  • Fixed the DD Manager UI freezing under certain conditions when editing LDAP group capabilities.

Known issues​

The following issues are knowingly included in the release:

  • It is not possible to upgrade from a version prior to 4.2.0 to 4.4.0 on a device which has an invalid hostname configured. Doing so will cause the firmware upgrade to be aborted and rolled back to the previously installed version.
    • A valid hostname may contain alphanumeric characters (a-z and 0-9), dot (.) and dash (-). The hostname may be up to 64 characters in length.

File Transfer​

New features​

The following new features have been added in this version:

  • Added symbolic link support for the SFTP and NFS protocols. The service can be configured to transfer all symbolic links, transfer no symbolic links, or transfer only symbolic links with targets inside the file share.
  • Added a setting to remove backed-up files when starting the service.

Improvements​

The following improvements are included in this release:

  • Third party dependency upgrades.

Bug fixes​

The following bugs have been solved in this version:

  • Fixed an issue where stopping the NFS File Transfer service would sometimes not update its status in the UI until stopped again.

Known issues​

The following issues are knowingly included in the release:

  • File Transfer files will fail to upload if there already exists a directory or symbolic link with the same name.
  • Version 4.4.0 of the File Transfer service cannot interoperate with earlier versions. When updating the service, the Upstream and Downstream services must be updated at the same time.

HTTP​

Improvements​

The following improvements are included in this release:

  • Third party dependency upgrades.

Bug fixes​

The following bugs have been solved in this version:

  • HTTP requests toward the service are now forwarded in the same order they are received.

MQTT​

Improvements​

The following improvements are included in this release:

  • Third party dependency upgrades.

OPC UA​

Improvements​

The following improvements are included in this release:

  • Added support for additional security policies.
  • Added support for array type values.
  • Updated Third-party dependencies.

Bug fixes​

The following bugs have been solved in this version:

  • Fixed an issue where the OPC UA service was not able to handle requests with a large number of nodes.

TCP​

Improvements​

The following improvements are included in this release:

  • Third party dependency upgrades.

UDP​

Improvements​

The following improvements are included in this release:

  • Third party dependency upgrades.
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