In the world of industrial automation, the "License key not available" popup for WinCC Logging is a classic stumbling block for many engineers. Here is the story of how this error usually unfolds—and how to fix it. The Missing Piece of the Puzzle

Open Siemens Automation License Manager and ensure the logging license is present on the PC.

: Enabling "Good Manufacturing Practice" (GMP) or Audit Trail options automatically triggers a logging requirement because these features rely on system-level logging. You can disable this in Runtime Settings > Good Manufacturing Practice to remove the license requirement. SmartServer Service

If you tell me which version of TIA Portal you are using, I can provide the exact part number for the license you need.

Useful diagnostic info to gather before support

ALM Version: Ensure you are using the latest version of the Automation License Manager, as older versions sometimes have compatibility issues with Windows 10/11.