Opto22 - Resources & Tools

Switching between redundant Ethernet links may cause all digital output channels on a groov I/O module to turn on

Knowledge Base - KB91318 - 10/15/2025

If your strategy periodically turns on a digital output channel on a groov I/O module, and you have redundant Ethernet links (only available in PAC Control Professional) between an affected controller...more

POSTs to the SNAP PAC REST API may fail when the closing bracket is on a different line than the data

Knowledge Base - KB91226 - 10/8/2025

When attempting to send a POST to the SNAP PAC REST API, the POST may fail if the closing bracket is on a different line from the data.

Using 'Receive String Table' to read from a file may return -39 (timeout error)

Knowledge Base - KB91223 - 10/7/2025

Digital TPOs are enabled after I/O unit restart

Knowledge Base - KB91304 - 10/10/2025

Ignition gateway is restarted when it's already running

Knowledge Base - KB90793 - 10/1/2025

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 fully...more

Tooltips appear incorrectly on graphics in PAC Display Runtime

Knowledge Base - KB91303 - 9/30/2025

When you hover your cursor over a graphic in PAC Display Runtime, you may see a tooltip appear in the wrong location with incorrect tag information, or a tooltip may not appear at all.

Attempting to download PAC Control strategy with redundancy fails

Knowledge Base - KB91152 - 9/30/2025

Controller not reading in all characters of a file

Knowledge Base - KB91286 - 9/30/2025

On a SNAP-PAC-R1 (GEN2) controller, when you view the COM handle value through the Inspect dialog, it may show a smaller value of characters left to read than the actual number. When trying to read...more

Filename from string tag may fail for trigger-based event in PAC Display

Knowledge Base - KB57406 - 5/23/2007

If a trigger-based event (such as a recipe or a historic data log) is configured to obtain a filename from a string tag in a PAC Control strategy, the filename retrieval may fail.

‘Find and Replace’ tool in PAC Control may not work correctly in OptoScript blocks

Knowledge Base - KB57575 - 5/23/2007

The Find and Replace function in PAC Control does not work correctly for OptoScript blocks. From the Find and Replace window, the Replace All button may cause the application to lock up or place the text...more

In Ignition, dragging a tag into the Tag Browser changes status to Uncertain_LastKnownValue

Knowledge Base - KB91274 - 8/21/2025

In Ignition, when you drag a tag with a known good quality to the Tag Browser, the quality of the tag may change to Uncertain_LastKnownValue.

Port redirect configuration disappears after updating firmware or restoring a backup

Knowledge Base - KB91270 - 8/22/2025

If you perform a firmware update with Backup Settings enabled or restore a backup, the port redirect configuration and rules are lost.

Port Redirect configuration not restored after power cycle

Knowledge Base - KB91262 - 8/21/2025

If port redirection is configured, and later power is cycled or you restart the unit using groov Manage, the configuration is lost.

groov Manage incorrectly reports Ignition 8 as disabled

Knowledge Base - KB91261 - 8/21/2025

Ignition may not start

Knowledge Base - KB91252 - 8/21/2025

When you try to enable Ignition or Ignition Edge, you may observe that Ignition doesn't start or, if Ignition does start, and then you restart your RIO, Ignition may not start.

Possible strategy corruption in PAC Control after copying/pasting OptoScript block with PID loop

Knowledge Base - KB91105 - 10/24/2025

If you copy an OptoScript block with a PID loop from one strategy and paste it into another strategy, you may encounter an “Undefined Command” error when attempting to download the strategy.

PAC Control strategies may not compile after renaming variables in OptoScript blocks

Knowledge Base - KB91238 - 10/24/2025

When attempting to compile a strategy after renaming an existing variable used in an OptoScript block in PAC Control, the strategy may not compile.

Size > “Height to Tallest” adjusts gadgets to shortest gadget

Knowledge Base - KB91180 - 7/2/2025

In Build mode, when you select a group of gadgets and then right-click to select Size > Height to Tallest, groov View should adjust the height of all the gadgets in the group to match the height of...more

Updating module firmware in PAC Manager may fail if firmware filename contains a parenthesis

Knowledge Base - KB91213 - 10/24/2025

When attempting to install module firmware in PAC Manager, you may encounter a “Command Failed” error message if the module firmware filename contains a parenthesis.

The Closing Window Setup dialog in PAC Display hangs and cannot be dismissed

Knowledge Base - KB91221 - 10/24/2025

When clicking on a graphical dynamic object that jointly closes a window in PAC Display and performs an I/O (read or write) operation, a Closing Window Setup dialog may appear that cannot be dismissed.

groov EPIC's LCD becomes unresponsive when external monitor is connected

Knowledge Base - KB91228 - 8/21/2025

When you connect an external monitor to a groov EPIC's HDMI port, the EPIC's LCD screen may go blank and becomes unresponsive.

Data Service reports connection errors when scanning string area of Scratchpad

Knowledge Base - KB91212 - 6/20/2025

Time is not restored correctly when the processor boots up

Knowledge Base - KB91227 - 6/20/2025

When the processor boots up, the time is not restored correctly. If NTP is configured and NTP servers are accessible, the correct time will be restored quickly enough that you might not notice this issue.

Some pages in groov Manage display "server offline" message

Knowledge Base - KB91222 - 6/20/2025

Configured PID loops do not appear correctly in PAC Manager

Knowledge Base - KB91132 - 10/24/2025

When you configure a new PID loop in PAC Manager, it may appear at the top of the configuration tree instead of in the PIDs folder under I/O Units.