When developing HMI/SCADA applications using Siemens TIA Portal, particularly with , engineers often encounter the frustrating error message: "License key not available! WinCC Logging for Runtime Advanced."
The message explicitly signals that the system is trying to execute historical data archiving without the mandatory add-on authorization.
If you see this error, follow these systematic checks to restore your logging functionality. 1. Verify the Project Requirements
The error is frustrating because it often appears after everything else is working perfectly. The root cause almost always lies in the gap between what you think you licensed and what is actually installed on the runtime machine.