Legitimate licensing via Siemens or an authorized partner is the only secure, compliant, and reliable path.
Ensure you have actually purchased the "WinCC Logging for Runtime Advanced" license.
This comprehensive guide breaks down why this error occurs, how the licensing model operates, and exactly how to resolve or troubleshoot the warning. Why Is This Error Occurring?
When WinCC Runtime Advanced boots up, the background license service checks the local system for valid authorization. The logging warning typically arises from three primary structural or environmental scenarios:
If the license is completely missing, you must order it from Siemens. You can verify the product codes using the Siemens SiePortal. License Option Delivery Type Online Download (OSD) or Physical USB
You might have a valid license, but you are logging too many variables.
If you're directly interacting with a Siemens support team or forums, providing the specific WinCC version and details about your configuration can help in getting precise advice.
If you do not actually need to save historical data and only want to clear the error message, you can disable the logging functions in your project.
: While Comfort Panels include logging capabilities in their hardware price, PC-based systems require these as "Options". Common Causes & Solutions WinCC Advanced Runtime and license - Siemens SiePortal
If you do not require historical trends or alarm archives, you can remove the error message by turning off logging: Navigate to -> Logging in TIA Portal. Delete any tags assigned to a log. Go to HMI Alarms -> Alarm Log and remove log settings. C. Check GMP Settings
You likely have the main "WinCC Runtime Advanced (PowerTags)" license, but logging (historical data) requires its own key.
If you have purchased a logging license, you need to transfer it to the target PC using the ALM.
Fixing "License Key Not Available: WinCC Logging for Runtime Advanced"