Sometimes, even with all licenses correctly installed and services running, the runtime application may lack the system permissions needed to read the license information from the ALM.
This message typically triggers because the Runtime detects a configured "Logging" function but cannot find a valid corresponding key in the Automation License Manager (ALM) Separate License Required
如果你确认，可以按照以下步骤彻底清除：
Open the on the Runtime PC.
: Certain services like the SmartServer may start automatically and trigger license warnings even if not used in your project.
Verify error messages
The system was running on a temporary 21-day trial license that has since expired. Sometimes, even with all licenses correctly installed and
In WinCC Runtime Advanced, licensing is granular compared to comfort panels. The base license (or higher) is sufficient to run the application, but it does not include the functionalities for archiving or logging. If your project utilizes: Tag Logging (Archives) Alarm Logging (Alarm Archives) Recipes
Sometimes the license file becomes "linked" to a specific drive or computer incorrectly.
: If an Industrial PC (IPC) is shut down abruptly, licenses may not be released correctly and can appear as "defective" in the Automation License Manager (ALM) the next time they are started. Verify error messages The system was running on
对于维护人员和自动化工程师而言，熟练掌握 ALM 的诊断技巧、理解 WinCC 的许可依赖关系，是保障生产系统稳定运行的关键能力。希望这份指南能帮你节省排查时间，让你少走一些弯路。
and verify the "WinCC Logging for Runtime Advanced" license is visible. Right-click > Check the license to ensure it isn't marked as "defective". If you have the Certificate of License (CoL)
Ensure that the logging settings are not configured in a way that exceeds your installed license, or disable logging features if they are not required. If your project utilizes: Tag Logging (Archives) Alarm
Rarely, security software or virtual network adapters block the communication between TIA Portal and ALM.