After deploying and starting of the ogamma Visual Logger for OPC, it needs to be activated with activation code, following steps below:

  1. Obtain activation key:


    For Academic Edition license keys please contact Support.

    • Click on the link for checkout page for desired edition. This will redirect you to the online payment system web page.


    Although it is called payment system, no credit card is required for free Community Edition.

    • On the online payment system web page, enter your contact information and click on Submit button.
    • The system will generate activation code and send it to the e-mail address you provided. From that e-mail you will need activation key, which starts by letters VL:
  1. Activate ogamma Visual Logger for OPC using its web configuration GUI which is by default available at http://localhost:4880. All license related activities can be done via License Information dialog window, opened by menu License/Status.


You need first login in order to access the menu License. Defaut credentials are admin / password.

In case if the machine where ogamma Visual Logger for OPC is running has access to the Internet, activation can be done in online mode. If that machine has no access to the Internet, use offline activation mode. Steps to activate for these 2 cases are described in subsections below.

  • 2.1. Online activation.

    Screenshot below shows License Information dialog window to activate in on-line mode. Note that checkbox Activate off-line is off.

    • In the e-mail received in the previous step, find activation code (it is started by letters VL) and copy it into clipboard.
    • Paste activation code into the Activation Code field. After entering the value, call to the backend is made, after that appearance / visibility of GUI controls might change. For example, if the activation key was already used before, label on the button Activate will change to Reactivate.
    • In the Password field enter password, which will be used by online License Portal to access your activation code in the future, as well as that password is required to de-activate license and activate in other computer when such transfer is required.
    • In the next field confirm password.
    • Enter email address, which will be used by online License Portal to restore your password in case if you forgot it.
    • Click on the Activate button to complete activation. Dialog window will popup asking to accept license terms.
    • After accepting license terms, ogamma Visual Logger for OPC will connect to the online licensing server and will be activated in case of success. After completion, notification message will appear displaying result of activation.
    • Refresh web page to display content which was not displayed in non-licensed state.

  • 2.2. Offlie activation.

    If ogamma Visual Logger for OPC cannot connect to the Internet, then turn on checkbox Activate offline.

    • Paste activation code into the Activation Code field;
    • Click on the Activate button.
    • In the popup dialog window accept licensing terms.
    • In case of success, intermediate offline activation file ogamma-logger.lic will be created by the backend, and become available to download by link Download offline activation file. Download it.

    • Open offline activation portal by the next link Upload file to the offline activation page ..., chose previously downloaded file ogamma-logger.lic and upload it.

    • Enter new password and email.

    • Cick on Activate button.

    • Download generated license file ogamma-logger.cdm.


    • Return to the License Status dialog window

    • By clicking on the button Select offline license activation file select file ogamma-logger.cdm and upload it by clicking on the button Upload.

    • The license activation file will be uploaded, and dialog window will show current status as licensed.



    License file ogamma-logger.cdm is expected to be located always in the folder ./data/[InstanceId]/ (relative to the work directory) where [InstanceId] is unique identifier of the applicaion instance. The folder is created at the very first startup of the application. If you change location of the application installation folder or work directory, make sure to move license file accordingly too.


To manage your licenses, you can login to the License Portal, which is accessible via License/My License Portal menu.


If you need to move the instance of ogamma Visual Logger for OPC to another machine, that instance can be de-activated. The password which was used at activation stage will be required.

To re-activate instance in another machine, repeat activation steps on that machine. In case if it fails with error message saying that re-activation is expected, button Re-activate will be enabled and after entering of old password and new password re-activation should succeed.

Upgrade product edition with a new key.

In order to upgrade to commercial product edition:

  • Deactivate existing license.

    • Via menu License/Status, open the License Information dialog window.
    • Click on the button Deactivate.


    For de-activation it will ask you to enter the old password used at the activation. If you do not remember that password:

    • Copy existing license key into clipboard (from the License Information dialog window).
    • Close that window, open Licensing portal (via menu License / My license Portal).
    • In the Manage License Info / License Code field paste license key from clipboard.
    • Click on the Recover Password button.

    An email will be sent to your address with your password.

  • Activate with the new license key.