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If I/O unit on redundant network is available, IsIoUnitReady and IsIoUnitCommEnabled commands may return false
Knowledge Base - KB91353 - Published:
If your PAC Control strategy works with a SNAP I/O unit configured with redundant Ethernet links, when communication is lost on the primary Ethernet link and the secondary Ethernet link becomes active...more
Digital TPOs start operating upon I/O unit boot-up or after restart
Knowledge Base - KB91304 - Published:
After an I/O unit boots up or restarts, any I/O configurations stored in persistent memory are restored. If a TPO is restored, the TPO should not start controlling the digital output, but with this issue, it may.
SNAP PAC controllers and brains may not store Analog TPO period configuration to flash memory
Knowledge Base - KB91292 - Published:
If you have configured the TPO Period field on the Analog Point page in the Inspect Opto 22 Device window in PAC Manager, and you save the configuration to flash memory on a SNAP PAC controller, this TPO...more
"Copy Fail" Vulnerability in groov RIO
Knowledge Base - KB91499 - Published:
A vulnerability in the Linux kernel in groov RIO modules could be exploited by an attacker to obtain unauthorized administrative (or root-level) privileges to your groov RIO by crafting specific logic through Node-RED, CODESYS, or shell (SSH) access.
“Dirty Frag” Vulnerability in groov EPIC and RIO
Knowledge Base - KB91509 - Published:
The “Dirty Frag” vulnerability—a local privilege escalation vulnerability consisting of two separate CVE IDs (CVE-2026-43284 and CVE-2026-43500) could be exploited...more
groov RIO may not connect to network after a power cycle during network disruption
Knowledge Base - KB91501 - Published:
After a specific series of events that include a network disruption before you cycle power to a groov RIO, when you attempt to connect to your groov RIO, the browser reports that it can’t find the RIO.
Restoring a groov RIO in Independent Port Mode may fail if using a pre-4.1.0 firmware backup file that includes Firewall settings
Knowledge Base - KB91439 - Published:
If restoring a groov RIO in Independent port mode (groov Manage Home > Network > Configure > Port Mode field) with a backup file created in pre-4.1.0 firmware, you may encounter a restore...more
When Node-RED and groov View (groov EPIC only) are disabled, Uptime and Last Started fields in groov Manage display incorrect values
Knowledge Base - KB91414 - Published:
When Node-RED and groov View (groov EPIC only) are disabled, the Uptime and Last started fields on their respective groov Manage pages may display incorrect values.
A groov RIO with RSTP enabled may lose Ethernet connectivity on a network that has BPDU Guard enabled
Knowledge Base - KB91443 - Published:
RSTP is enabled by default on groov RIO devices running the affected firmware version. With RSTP enabled, a groov RIO may lose Ethernet connectivity and become unreachable when connected to a network switch that has BPDU Guard enabled.
A Node-RED Dashboard UI-only user can't access the Node-RED dashboard
Knowledge Base - KB91428 - Published:
If you create a FlowFuse Dashboard (also known as the Node-RED Dashboard 2.0) and a Node-RED Dashboard UI-only user, when the user logs in and attempts to view the dashboard, groov Manage displays the login screen instead of the dashboard.
Node-RED on groov devices running pre-4.0 firmware may encounter memory leaks and restarts when accessing groov devices running 4.1.0 firmware with new web server certificates
Knowledge Base - KB91418 - Published:
When groov Manage is used to create new web server certificates on devices running firmware 4.1.0 and higher, it may cause Node-RED on groov devices running firmware 3.6.1 and lower to unexpectedly...more
Error message when trying to create Data Service server certificate with fixed IP address
Knowledge Base - KB91386 - Published:
When you try to create a certificate for the Data Service and you specify a static IP address in the Server Name field, when you click Create, groov Manage displays an error message and does not create the certificate.
External monitor screen goes blank when selecting certain video modes
Knowledge Base - KB91067 - Published:
For a few external monitors, when you select a different video mode (from the groov Manage Home page, select System > Display > Video Mode), the external monitor may not display anything (it may turn black or red).
Ignition gateway is restarted when it's already running
Knowledge Base - KB90793 - Published:
On the groov Manage Ignition page, if your selected platform is already running (you can see Running in the Status section) and you click Save, the platform is restarted (the gateway is...more
Message does not clearly explain restricted I/O channel combinations on universal I/O modules
Knowledge Base - KB89913 - Published:
For the following modules, if you try to configure a mix of digital outputs and thermocouples in channels 0 through 3, groov Manage should display a message to explain that the mix is not supported.

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