Opto22 - Resources & Tools

If OPC-UA Server Unavailable, Updating Static Tags and Switching to groov View May Cause Freeze

Knowledge Base - KB83954 - 7/5/2023

In Build mode of groov View, if an OPC-UA server is invalid or unreachable and you try to update static tags, groov View will be unable to update them. If you cancel the update and then switch...more

User repeatedly prompted to change password

Knowledge Base - KB89890 - 7/6/2023

The user is prompted to change their password every time they attempt to log in to the groov EPIC or groov RIO.

Large Projects Time Out Before Loading in Build Mode

Knowledge Base - KB88103 - 7/6/2023

In groov View, if you try to go to Build mode with a very large project, groov View will time out and not open the project.

groov View shows yellow triangle "trying to connect" error on gadget with Data Simulator tag

Knowledge Base - KB85756 - 7/6/2023

If you use Data Simulator tags with a Level Indicator gadget to build a page in groov Build and then switch to groov View, you see yellow triangles flash approximately 10-12 seconds after the page loads....more

Cannot access my groov Box via the hostname

Knowledge Base - KB83966 - 7/5/2023

When starting a groov Box, if you try to access groov before the SYS LED has stopped blinking, you might not be able to log in using the hostname. The browser returns an error that says it cannot find...more

In groov, Modbus writes don't take array indexes into account

Knowledge Base - KB84389 - 7/5/2023

In groov, writes to a Modbus array tag affect only the first element in the array. Regardless of the index chosen, groov writes to element 0.

After PAC Control strategy is updated, groov View reports tags not available

Knowledge Base - KB88974 - 7/6/2023

If you rename tags in a PAC Control strategy and update that strategy in groov View, groov View may continue to try to use the original tag names. Affected gadgets will show yellow triangles and report...more

groov Data Store API reports incorrect errors after free trial expiration

Knowledge Base - KB86546 - 3/14/2018

If your groov is unlicensed and your trial period has expired, groov View stops allowing access to a Data Store device. The Data Store API returns HTTP 503 errors ("Service Unavailable") instead of an informative error.

In groov Admin, wireless access point security setup allows incorrect password length

Knowledge Base - KB86343 - 7/6/2023

In groov Admin, you can set up the groov Box to be used as a wireless access point. The default security type allowed for the access point is WPA2, but if you enter a password that's an incorrect length...more

In groov Server, Backup project doesn't complete the backup if you have unsaved changes and click "Yes"

Knowledge Base - KB84407 - 7/6/2023

In groov Server for Windows, when you choose File > Backup Project to Computer, if you have unsaved changes, groov prompts you with this message: "This project has unsaved changes. Save changes before...more

In groov Build, the first attempt to update a strategy may not work

Knowledge Base - KB85033 - 7/6/2023

If you are using a SNAP PAC controller with groov and make a change to the PAC Control strategy, the .idb.txt file must be updated in groov so that the change is registered. However, in some browsers...more

In groov Admin, cannot set up Wifi when connected via link-local IP address

Knowledge Base - KB84953 - 7/6/2023

When you are trying to set up a Wifi connection for the groov Box using groov Admin, if you are connected directly to the Box using a link-local IP address (169.x.x.x) and choose to connect to a Wifi...more

In groov View on a mobile Android device, the gear symbol menu only displays the Refresh groov View option

Knowledge Base - KB84007 - 7/5/2023

When in groov View on a mobile Android device, clicking on the gear symbol in the top-right corner only displays the Refresh groov View option. There should also be the options to log in or log out and...more

groov App password reset does not work for account holder

Knowledge Base - KB83429 - 7/5/2023

If a groov View account holder forgets his or her password, an admin can go into groov Build and initiate a password reset, providing a temporary password. However, the user is unable to use the temporary password to log in and set a new password.

Error during setup process after groov is restored to default settings

Knowledge Base - KB83259 - 7/5/2023

When groov is restored to the default settings after a database has been created in groov with a user account, when you try to create a new account through the setup process, a dialog box may pop up...more

groov may lock up after running fine for 40 minutes (corrupt project file)

Knowledge Base - KB84989 - 7/6/2023

After running fine for 40 minutes, groov locks up and becomes unresponsive. When you restart groov and inspect the logs (click the bell icon and choose Message Logs), you see a message like this:2015...more

Cannot log into groov Admin on groov Box products with usernames that contain spaces

Knowledge Base - KB90841 - 1/31/2024

You may encounter an “invalid character” error message when attempting to log into groov Admin on groov Box products if your username contains a space.

groov Manage shows quality error when Quality Indicator is turned off

Knowledge Base - KB87641 - 7/6/2023

In groov Manage, if you configure an individual analog input channel to turn off the Quality Indication, groov Manage still shows a quality error for that channel.

A popup in groov R2.2a says that an older project is not compatible

Knowledge Base - KB84000 - 7/5/2023

After upgrading to groov version R2.2a from version R1.0, a popup message says that your groov project is incompatible with the current version of the application.

groov Box loses static IP address

Knowledge Base - KB83975 - 7/5/2023

Cannot communicate with groov Box at static IP address. Cannot communicate with groov Box through a router; the gateway or DNS settings get deleted.

Control engine keeps trying to access a groov I/O unit that is offline

Knowledge Base - KB88226 - 7/6/2023

If the control engine gets an error when trying to communicate to a groov I/O unit, the control engine should disable communication to that groov I/O Unit so that the control engine doesn't...more

Browser may fill in groov Manage fields (autocomplete)

Knowledge Base - KB89736 - 7/6/2023

Browsers may automatically fill in some groov Manage fields with undesireble text.

UTF-8 string may get truncated when written with groov Manage REST API

Knowledge Base - KB88185 - 7/6/2023

When writing a UTF-8 string with the groov Manage REST API, the written string may be truncated.

groov Manage appears unresponsive when uploading large or many files

Knowledge Base - KB87984 - 7/6/2023

If you upload a very large file or many files, groov Manage appears to become unresponsive.

groov View gadgets may not update when time set back

Knowledge Base - KB88193 - 7/6/2023

If you set back the processor or controller's time, some gadgets in your groov View project may stop updating.

In groov View, moving an Edit Value dialog box from a text input gadget jumps the box to the middle of the page

Knowledge Base - KB87416 - 7/6/2023

In groov View, moving an Edit Value dialog box from a text input gadget jumps the box to the middle of the page.

groov Manage: text on Download Backup button disappears

Knowledge Base - KB87433 - 7/6/2023

In the Backup page of groov Manage, when you hover over the Download Backup button, the text on the button disappears.

groov View displays Unicode escape sequence instead of the correct character

Knowledge Base - KB87299 - 7/6/2023

groov View displays Unicode escape sequence instead of the correct character.

groov View for iOS Cancel button does not work after failed password attempts

Knowledge Base - KB86254 - 7/6/2023

In groov View for iOS, when you try to cancel after failing to enter a correct password, the Cancel button stops working.

groov Trend gadgets allow negative periods

Knowledge Base - KB86221 - 7/6/2023

In groov Build, the Trend gadget allows you to set a negative period. If you do so, no data will be rendered and no data stored.

In groov, OPC UA Static Array may generate index error asking for a negative index value

Knowledge Base - KB85806 - 7/6/2023

In groov Build, when you try to index an OPC UA static array, an error appears requiring a negative integer for the index.

In groov Build, OPC UA Static Array tags are disabled in the Tags tree

Knowledge Base - KB85796 - 7/6/2023

In groov Build, all OPC-UA array tags except for Byte Arrays are disabled in the Tags tree, so you cannot choose them.

After selecting and unselecting gadgets in groov Build, the arrow keys no longer work as expected.

Knowledge Base - KB84695 - 7/6/2023

In groov Build, after you select and unselect a few gadgets, you can no longer move the gadgets with the arrow keys.

In Build mode of groov View, changing gadget z-order only works with one gadget at a time

Knowledge Base - KB84693 - 7/6/2023

In groov View, even when you select multiple gadgets, you can send only one gadget to the back or the front at a time.

In groov, the Value gadget does not display a NaN

Knowledge Base - KB84872 - 7/6/2023

When you apply a tag to a gadget in groov Build, but the tag has a NaN (out of range) value, the gadget displays the # sign.

groov Build: Cannot use Ctrl-V hotkey to paste gadgets between pages

Knowledge Base - KB84849 - 7/6/2023

In groov Build the paste hotkey, Ctrl-V, does not work to paste gadgets copied or cut from one page into another page.

PortInUse error appears when installinggroov Server for Windows

Knowledge Base - KB83587 - 7/5/2023

While installing groov Server for Windows, a PortInUse error appears, as follows:

groov View gear menu does not resize properly with browser window

Knowledge Base - KB84010 - 3/14/2018

If you open the gear menu in groov View and resize the window, the gear menu does not resize or follow the browser's window properly.

Internet Explorer 10 does not display groov properly

Knowledge Base - KB83290 - 7/5/2023

In Internet Explorer 10, groov View and Build do not display correctly and appear to be broken.

groov EPIC power supply information appears incorrectly in groov Manage

Knowledge Base - KB90862 - 4/2/2024

When examining a groov EPIC power supply with a valid serial number in groov Manage (Info and Help > About), you may be provided the following incorrect information: Part name: Unknown Model ...more

groov Manage doesn't display fields to enter Steinhart-Hart coefficients

Knowledge Base - KB90170 - 7/6/2023

In groov Manage, when you are configuring a GRV-ITR-12 module and you select FastADC, Thermistor: Custom Curve for the channel type, groov Manage does not display the fields to enter the Steinhart-Hart Coefficients.

groov View may hang while using video gadgets with the proxy option enabled

Knowledge Base - KB89845 - 7/6/2023

If you have video gadgets with the "Use groov as a proxy option" enabled, and if the connection to the camera is not reliable, groov View may stop responding. If the page with the...more

groov Manage Doesn't Correctly Display PAC Control REST API Swagger Configuration File

Knowledge Base - KB89053 - 7/6/2023

When you go to the PAC Control REST API reference (from groov Manage Home page, click Info and Help > REST APIs > PAC Control for groov EPIC), Swagger reports an error: "Parser error on...more

Can't log in if the time on groov box or server is earlier than the creation time of the user account

Knowledge Base - KB83753 - 3/14/2018

Attempts to log in to groov App result in a pop-up dialog with the message "You are not logged in." This problem will occur and persist as long as the system time on the groov Server or groov...more

GROOV-AT1 is restored to defaults if power button is pressed twice within 4 seconds

Knowledge Base - KB84140 - 7/6/2023

On the GROOV-AT1 Box, if you press the power button twice within four seconds, the groov Box will be restored to defaults. The procedure for restoring the groov Box to defaults is to press the power...more

SVG image in groov does not appear or is out of proportion

Knowledge Base - KB85818 - 7/6/2023

If you upload an SVG image to groov with the image's size specified in anything but pixels, groov may not be able to correctly render it, and the image may appear with an incorrect aspect ratio or may...more

groov Server shows "Updates Available" even though just updated

Knowledge Base - KB84422 - 7/6/2023

After you download and install the most recent version of groov Server for Windows, the orange updates icon still appears.If you click the icon, the "Your groov Version" box shows the previous version,...more

Signing out of groov Manage in One Tab Does Not Sign Out of All Tabs

Knowledge Base - KB89168 - 7/6/2023

If you have groov Manage open in multiple browser tabs or windows for one GRV-EPIC-PR1, logging out of one of those tabs may not log you out of all of the other tabs. This may be more...more

groov Admin SSL error occurs after restoring groov to defaults

Knowledge Base - KB83228 - 7/5/2023

groov Admin will display an SSL error during the "welcome to groov" setup process. In Chrome, the error message is "SSL Connection Error." In Firefox, the message is "Secure Connection Failed."

groov View for iOS often reports "low memory"

Knowledge Base - KB84185 - 7/6/2023

When you're using groov View for iOS, a "low memory" error message pops up. The issue occurs primarily on pages with a video gadget.

Internet Explorer 10 and 11 behaviors affect groov on an Intranet

Knowledge Base - KB83690 - 7/5/2023

When groov is accessed using Internet Explorer 10 or 11 in Intranet mode, groov will not load pages, enter Build mode, or add an Image to the Image gadget. Whether Intranet mode is triggered or not in...more

EPIC or RIO OpenVPN connection may not reconnect after session expiration

Knowledge Base - KB89580 - 7/6/2023

If you configure a groov EPIC or groov RIO with a user-locked OpenVPN connection profile connecting to an OpenVPN Access server, the groov EPIC or groov RIO client may not automatically reconnect to the server after the session expires.

A wireless connection to a groov Box will not work if Encryption Type is set to None

Knowledge Base - KB83602 - 7/5/2023

In groov Admin, when the Encryption Type for a wireless connection is set to None, you cannot communicate to the groov Box over the wireless network. On Admin's Network Configuration page, the Link...more

groov may not correctly restrict access to unregistered devices

Knowledge Base - KB86774 - 7/6/2023

After you delete a device from groov, you may continue to see groov talking to that device, despite messages in the logs stating that access to the device has been rejected.Those log messages will look...more

Error when trying to connect to groov (weak key or unsupported cipher)

Knowledge Base - KB84792 - 7/6/2023

When trying to connect to the groov Box or groov Server for Windows, you see an error from your web browser that may mention an unsupported cipher or weak ephemeral key. Examples of possible errors...more

All groov I/O module LEDs turn red and OptoMMP server is unresponsive

Knowledge Base - KB87682 - 7/6/2023

If your control program writes to the Stream Configuration area (0xF03FFFC0) of the memory map, all groov I/O module LEDs on the groov EPIC chassis will turn red and the OptoMMP Server becomes unresponsive.

Communication to groov I/O unit disabled with -56 error

Knowledge Base - KB88441 - 7/6/2023

Any PAC Control command that accesses the groov I/O unit and results in an Invalid Address (-56) error disables communication to the I/O unit. This error should not disable communication to the groov I/O unit.

"Operation Failed; retrying" error when logging into groov using IE on PC or Safari on Mac

Knowledge Base - KB86120 - 7/6/2023

When trying to log into groov using Internet Explorer on a PC or Safari on a Mac, you see the error "Operation Failed; retrying."This error occurs if the date and time of the groov Box are incorrect (typically by more than 2 weeks).

groov Box is vulnerable to a man-in-the-middle attack

Knowledge Base - KB83894 - 7/5/2023

groov Box is vulnerable to a man-in-the-middle attack. A remote attacker with a man-in-the-middle vantage point on the network may be able to decrypt or modify traffic between a client and the groov Box.

Some channel configurations may not restore from persistent memory

Knowledge Base - KB90696 - 8/31/2023

If you configure channels on through groov Manage and then restart the groov RIO module or groov EPIC processor, one or more of the I/O channel configurations may not be restored from persistent memory.

groov View forces you to change your password every time you log in

Knowledge Base - KB87145 - 7/6/2023

Every time you log in to groov View, a message prompts you to change your password (even if you've already changed it).

groov View pages with over 100 gadgets may be slow to load and update

Knowledge Base - KB86714 - 7/6/2023

When a groov View page has more than 100 gadgets, sometimes the gadgets on the page are slow to load and update.

In groov View, Trend tags don't show up when you view Tags In Use

Knowledge Base - KB86425 - 7/6/2023

When you view the tags in use in Build mode of groov View (by clicking View > All Tags), tags used in Trends do not show up in the list.

groov Admin configuration restart button restores to defaults instead of restarting

Knowledge Base - KB83242 - 7/5/2023

If you press the power button on the groov Box to restore the Box to defaults and then later try to cycle power to the Box using the Restart button in the groov Admin configuration page, the Box will...more

Loading Tags dialog box stuck after changing user password and logging out

Knowledge Base - KB83468 - 7/5/2023

After you set a new user password in groov Build, log out, and log back in, the "Loading Tags" dialog box appears stuck in the center of the groov View screen. This issue applies to groov View pages that contain OPC-UA tags.

groov App is no longer accessible after a self-signed certificate is created in groov Admin

Knowledge Base - KB82872 - 7/5/2023

After a self-signed certificate is created in groov Admin and a restore defaults is completed using the On/Off button, groov App is no longer accessible. As an example, the image below shows the result of this problem in Google Chrome.

groov may become unresponsive or crash, and downloading system logs may result in zero byte files

Knowledge Base - KB86282 - 7/6/2023

Log databases in groov 3.2a were inadvertently allowed to grow unchecked. As a result, the file system eventually fills up with log data, and groov runs out of memory, causing these possible symptoms...more

groov: Using Internet Explorer, PAC Control strategy cannot be updated

Knowledge Base - KB84760 - 7/6/2023

If you add a new tag to a PAC Control strategy used in groov, you need to update the strategy's .idb.txt file in groov. If you try to do this using Internet Explorer, groov incorrectly indicates that...more

Modbus/TCP transactions may return incorrect exception code

Knowledge Base - KB89676 - 7/6/2023

When a client sends messages to the Modbus/TCP server on groov EPIC, groov EPIC may return the wrong Modbus/TCP exception code.

Trend-pen legend text is displayed in the wrong color

Knowledge Base - KB88755 - 7/6/2023

If you configure the background of a groov View trend to black, then groov View displays the trend-pen legend text in gray instead of white.

GRV-OVMAILP-8: If hot-swapped, could cause continuous resetting of PR1

Knowledge Base - KB88290 - 7/6/2023

A GRV-OVMAILP-8 module mounted on a groov EPIC chassis may not be discovered or causes the groov EPIC processor to reset.

Accounts page shows "null" for first user's email

Knowledge Base - KB87442 - 6/14/2018

For the first user created on a groov EPIC processor, groov Manage displays "null" as the email address in the Accounts page.

Slider and checkbox return to current value during confirm prompt

Knowledge Base - KB83686 - 7/5/2023

When you create a slider gadget in groov Build with the property Confirm, the slider's behavior in groov View is not as expected. In groov View, if you click on the slider and drag it to a new...more

groov View: Numbers greater than 999 are missing commas in Trends

Knowledge Base - KB86890 - 7/6/2023

In groov View Trends, numbers greater than 999 use spaces as delimiters. Instead, they should use commas.

Reading LBCD tag on Modbus device causes "Unknown error" and disconnection from device

Knowledge Base - KB88177 - 7/6/2023

If a gadget in your groov View project is configured with an LBCD tag on a Modbus device, when you run the project and groov View reads the LBCD tag, you will see an "Unknown error" message and groov View will disconnect from the device.

A simulated counter on a groov EPIC I/O unit or groov RIO provides erratic results

Knowledge Base - KB90673 - 7/29/2023

If a PAC Control strategy includes a groov RIO or groov I/O unit that is either not physically available to the system or is currently configured in the strategy with communication to the I/O unit...more

When the control engine is a groov EPIC PR1, PAC Control may stop responding if you click the Info, Warning, or Error button

Knowledge Base - KB87513 - 7/18/2018

Note: See related KnowledgeBase article, KB87514, groov EPIC PR1 host port may stop responding. If your strategy's control engine is a groov EPIC PR1, PAC Control may stop responding if you...more

Proxy setting for groov Video gadget does not work when security is enabled on IP camera

Knowledge Base - KB84171 - 7/5/2023

In groov, if you've enabled security on an IP camera (requiring authentication with a username and password to be passed in the URL), the groov Video gadget is unable to load the images.

Saving groov Build pages takes a long time, or on GRV-EPIC-PR1 reports 504 Gateway Time-out

Knowledge Base - KB89633 - 7/6/2023

When you try to save pages in groov View's Build mode, saving may take a very long time. Or, on a GRV-EPIC-PR1, you may see a 504 - Gateway Timeout error. All platforms show the slowdown; only the GRV-EPIC-PR1 shows the 504 Gateway Time-out.

In groov View for iOS on iPad, the display moves up when you return from changing app settings

Knowledge Base - KB86203 - 7/6/2023

In groov View for iOS on the iPad, if you tap the gear icon to change settings and then return to the app, the display moves up a bit each time. Note: This issue seems to affect only the iPad. iPhones do not display this symptom.

groov Find leaks memory and may become unresponsive if left open

Knowledge Base - KB90179 - 4/4/2024

If you leave groov Find open for an extended period of time (such as overnight), it may become unresponsive and use excessive memory.

Accessing PID loops on groov RIO causes “Device Failure” messages

Knowledge Base - KB90208 - 7/6/2023

Accessing a PID loop on a groov RIO using either PAC Display or OptoOPCServer will result in a “Device Failure” error.

groov View classic trend performance gradually slows down

Knowledge Base - KB89523 - 7/6/2023

The rate at which a Classic Trend refreshes and the responsiveness of the groov View page containing the trend may degrade over time.

groov View does not display change in data type of a Data Store tag

Knowledge Base - KB89233 - 7/6/2023

In Build mode, if you edit the type of a tag in a Data Store, groov View doesn't reflect that change until you leave and re-enter Build mode or refresh the browser.

Wiring diagram for GRV-IDCSW-12 is incorrect

Knowledge Base - KB88630 - 7/6/2023

In groov Manage, the wiring diagram for the GRV-IDCSW-12 module is incorrect.

Inaccurate readings from groov digital inputs configured with frequency feature

Knowledge Base - KB88588 - 7/6/2023

If your PAC Control strategy has a groov digital input configured with the Frequency feature, the readings may not be accurate.

Certain PID loop options on groov EPIC I/O Units may not work

Knowledge Base - KB88377 - 7/6/2023

When you configure a PID loop on a groov EPIC I/O unit, the options to set the output or switch to manual mode when the PID input goes out of range may not work.

Move Numeric Table to I/O Unit [Ex] on groov I/O causes stack error

Knowledge Base - KB88440 - 7/6/2023

When your strategy executes the Move Numeric Table to I/O Unit[Ex] command on a groov I/O unit, a "Data Stack Is Not Empty" (-95) error is added to the message queue.

groov Manage incorrectly reports Node-RED fails to restart

Knowledge Base - KB87979 - 7/6/2023

When you restart Node-RED from groov Manage, you may see an error that Node-RED failed to restart. However, this is a false error and Node-RED did restart correctly.

Unable to change the time manually on a Groov AR1

Knowledge Base - KB87657 - 7/6/2023

If you change the time on a groov AR1 manually and turn off the time server sync option, the time will sync back to the server time after a power or networking restart.

Access Denied error when logging in with groov EPIC Shell password that starts with @ symbol

Knowledge Base - KB88224 - 4/30/2019

If you created a groov EPIC Shell account with a password that starts with the @ symbol, when you attempt to login, you'll get an "Access denied" error.

groov Mobile App on Android OS 9 ("Pie") fails to connect

Knowledge Base - KB88187 - 4/11/2019

When you start your groov View project, you will see an error similar to "Failed to connect or load data from: <URL>." The path may point to a font/ folder and file.

Setting groov Digital TPO to Zero Percent Doesn't Stop Pulsing

Knowledge Base - KB88104 - 7/6/2023

In your PAC Control strategy, when you use the Set TPO Output command with a value of zero, it should stop the TPO. However, for groov digital output modules, it does not.

In PAC Control, configuring groov EPIC as an I/O unit with both IP addresses configured may cause strategy download to fail

Knowledge Base - KB87872 - 2/27/2019

In PAC Control, configuring groov EPIC as an I/O unit with both IP addresses configured may cause strategy download to fail

groov View yellow triangle error prevents access to trend features

Knowledge Base - KB87531 - 7/6/2023

In groov View, when a trend displays a yellow triangle error message for one of the pins, a user is unable to use the zoom or download data features of the trend.

groov View pages show a scroll bar when there's nothing to scroll to

Knowledge Base - KB86945 - 7/6/2023

Regardless of how long a page is in groov View, it is always scrollable. On Windows, that usually means a scroll bar is visible when it's not necessary.

Using groov with Internet Explorer may cause browser to slow down or become unresponsive

Knowledge Base - KB86464 - 2/15/2018

If you use groov with Internet Explorer, you may find that over time the browser slows down, becomes unresponsive, or even crashes.

On groov View for iOS, trying to change password fails when entering old password

Knowledge Base - KB86265 - 7/6/2023

In groov View for iOS, when you try to change your password, a failure message appears for the old password even when it is correct.

In groov View mobile app, automatic login does not work if username or password includes "&"

Knowledge Base - KB86246 - 7/6/2023

In the groov View mobile app, automatic login does not work if the username or password contains an ampersand (&). The login page appears.

groov Page Navigation gadget's page selector appears to support multiple links

Knowledge Base - KB84801 - 7/6/2023

In groov Build, when you add a Page Navigator gadget, you can click more than one page to link to. All of the pages you click on look like they're selected, and you can't deselect them.