Unlike Siemens Comfort Panels, which include logging functionality in the hardware price, requires a separate license key for any form of data archiving (Tag Logging or Alarm Logging).

Runtime Advanced logging failed because the required WinCC license key was not present or detected on the target machine. As a result, logging features for runtime (historical data, alarms, or diagnostics tied to licensed features) were unavailable, impacting data capture and troubleshooting.

: If the PC experienced an improper shutdown or power failure, an existing license may be marked as "defective" in the [Automation License Manager (ALM)](siemens.com (alm)-download?dti=0&lc=en-WW "Download Siemens ALM"). Step-by-Step Solutions 1. Identify the Exact Missing License

This forces WinCC to re-negotiate the license count without a full PC reboot.

typically occurs because the standard Runtime license does not include historical data archiving (tag or alarm logging)

如果你以前用过西门子的 SIMATIC 面板（比如 Comfort Panel 或 Multi Panel），你可能会觉得：Logging、归档、配方这类功能难道不是“自带”的吗？在 SIMATIC 面板中，情况的确如此，基础选项如 Logging 和配方已经包含在内，无需额外授权。

Refresh the view in ALM to ensure the license appears without errors. Phase 4: Restart the Runtime Service

If logging is required: Note down the exact software version of your Runtime Advanced station (e.g., V18).

...you are required to purchase and install an titled "WinCC Logging for Runtime Advanced" or a combined "Logging and Recipe" license. 2. Common Causes of "License key not available"

Navigate to the project's folder on the PC and delete the temporary files if the error persists. Launch Runtime: Restart the WinCC Runtime application.

The error message typically occurs because Siemens WinCC Runtime Advanced requires a dedicated, separate license for logging functions (data and alarm logs) that is not included with the standard Runtime license. Core Reasons for the Error

If the Runtime was active on an Industrial PC (IPC) and the power failed or the computer was shut down improperly, the license key can become "defective," showing a red symbol in the Automation License Manager .

What version of are you running (e.g., V17, V18, V19)?