Sometimes, the error arises from a compatibility issue between an older version of ALM and a newer version of WinCC Runtime Advanced.
: If an Industrial PC (IPC) shuts down improperly (e.g., power failure), the license may not be released correctly and can be marked as "defective".
: A historical trend, alarm log, or process data archive was enabled in the TIA Portal engineering project by mistake, triggering a mandatory system license check. Sometimes, the error arises from a compatibility issue
If you are using a SIMATIC IPC, ensure the license is on a authorized storage medium.
Siemens treats advanced data features as modular add-ons. If your WinCC project contains even a single historical data log or long-term alarm log, the system actively scans for a specific supplemental license at startup. If that license is missing, unfragmented, or corrupted, the runtime triggers the "License key not available" error. The Missing License: WinCC Logging for Runtime Advanced If you are using a SIMATIC IPC, ensure
The of TIA Portal and Runtime Advanced you are running (e.g., V17, V18, V19).
Before diving into solutions, it is critical to demystify the error text. If that license is missing, unfragmented, or corrupted,
What as installed inside your Automation License Manager? Share public link
Plug a USB drive into the computer containing the new license.