KB87475
Published:
Revision: 1.0

Gadgets report error messages when scanning OPC-UA devices while running groov View with an expired license


Applies To:

  • GROOV-AR1, GROOV-AR1-BASE, GROOV-AR1-SNAP
  • GROOV-AT1, GROOV-AT1-SNAP
  • GROOV-SVR-WIN, GROOV-SVR-WIN-BASE, GROOV-SVR-WIN-SNAP

Versions Affected:

Versions R3.5a through R4.0a


Symptoms:

For any pages that have gadgets that point to tags on OPC-UA devices, that gadget displays a yellow triangle and the following message:

​A value has not been received yet. groov is trying to connect to the controller or server.

When you look at system logs, you'll see many messages like the following:

2018-05-29T16:45:15-04:00 updateScannerSubscriptions - An exception occurred! 'java.lang.NullPointerException' FATAL - com.opto22.groov.server.data.SubscriptionManager

​For gadgets pointing to other devices, you may see the following messages:

Your license is expired! To renew your license, visit manage.groov.com or call 800-321-OPTO (6786).

You might see that the gadget displays some approriate values before it displays these symptoms because groov View was able to obtain some valid values before it scanned the gadgets pointing to OPC-UA devices.

Workaround:

Try one of the following:

  • On groov Server for Windows, stop groov View and delete the expired license file.
  • On any platform, install a valid license.

Resolution:

Opto 22 has resolved this issue and will include the fix in an upcoming release.

Questions?

Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com


DISCLAIMER

This Opto 22 Knowledge Base ('OptoKB') article is intended to provide general technical information on a particular subject or subjects and is not an exhaustive treatment of such subjects. Accordingly, the information in this OptoKB article is not intended to constitute application, design, software, or other professional engineering advice or services. Opto 22 may modify the OptoKB articles at any time. Before making any decision or taking any action which might affect your equipment, you should consult a qualified professional.

OPTO 22 DOES NOT WARRANT THE COMPLETENESS, TIMELINESS, OR ACCURACY OF THE DATA CONTAINED IN THIS OPTOKB ARTICLE AND MAY MAKE CHANGES THERETO AT ANY TIME AT ITS SOLE DISCRETION WITHOUT NOTICE. FURTHER, ALL INFORMATION CONVEYED HEREBY IS PROVIDED TO USERS 'AS IS.' IN NO EVENT SHALL OPTO 22 BE LIABLE FOR ANY DAMAGES OF ANY KIND INCLUDING DIRECT, INDIRECT INCIDENTAL, CONSEQUENTIAL, LOSS PROFIT, OR DAMAGE, EVEN IF OPTO 22 HAS BEEN ADVISED ON THE POSSIBILITY OF SUCH DAMAGES.

OPTO 22 DISCLAIMS ALL WARRANTIES WHETHER EXPRESSED OR IMPLIED WITH RESPECT TO THE INFORMATION (INCLUDING HARDWARE, SOFTWARE, AND/OR FIRMWARE) PROVIDED HEREBY, INCLUDING THE IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTIBILITY, AND NON-INFRINGEMENT. Note that certain jurisdictions do not sanction the exclusion of implied warranties: thus, this disclaimer may not apply to you.

Copyright © 2018 Opto 22. All rights reserved.