Once you have the license working, follow these practices to avoid recurrence:
This error typically manifests when you attempt to start a runtime project that includes data logging, archiving, or historical trending. Instead of seeing your data logs, the system either fails to start the runtime or runs in a degraded "demo" mode where logging is disabled or watermarked. license key not available wincc logging for runtime advanced
If you already own the license but the error persists, check the ALM. Licenses can be marked as "defective" if the IPC was not shut down properly. If marked red/defective, you may need to contact Siemens Technical Support to restore them. If you are only seeing this during Simulation Once you have the license working, follow these