The operation has stopped due to the stop mode.

If the license has not been activated and the demo operation time has expired, or if an invalid license is used, a message indicating that chaning to STOP mode is displayed and the OPC Server stops operating.

In order to check the license status, select [Help]> [License] on the menu bar and check that the status of the purchased license is OK.

If it is not OK, license activation is required.

Please refer to the User's Guide (Server) to check how to activate license.