Walk through the following steps:
1. Go to 'Start->Programs->MatrikonOPC->Modbus->MatrikonOPC Licensing Utility'.
2. Click on the 'Check Licenses' button in the bottom left hand corner.
3. Your server will be listed with the status of its license.
If the license is listed as permanent, the software is licensed correctly. If there is an expiry date listed or the server does not appear, the software is not licensed.
If you are having trouble with these steps, please download the latest version of the Licensing Utility and extract the file to C:\Program Files\Common Files\MatrikonOPC\Common (if this directory does not exist, place the file in C:\Program Files\Matrikon\OPC\Common).
For a detailed tutorial on checking software licensing, click
here.