它挥之不去，5 到 10 分钟后又会再次出现。点下“确认”似乎能暂时赶走它，但它像个不请自来的客人，过一会儿又回来了。更让你困惑的是，你觉得自己的项目中明明没有使用任何“Logging”功能。那这弹窗，到底是怎么回事？
Perform a "Software (rebuild all)" and download the updated project to the Runtime PC. 5. Common "Ghost" License Errors Sometimes, errors appear for services you aren't using.
: Resetting the system clock to an earlier time can invalidate installed licenses. Simulation Mode : Resetting the system clock to an earlier
Connect the engineering PC and the Runtime PC to the same network, or insert the Siemens license USB drive into the Runtime PC.
To help narrow down the solution for your specific setup, could you tell me: for engineering purposes
: This message frequently appears during simulation in TIA Portal even if logging isn't actively being tested; for engineering purposes, it can often be ignored as it does not typically block simulation functionality. Troubleshooting Steps Check the Automation License Manager (ALM) :
值得注意的是，如果你的 Logging 使用方式完全来自非 WinCC 原生功能 （比如通过外部脚本写入自定义数据库），WinCC 自身确实不会主动报告许可缺失。但是，如果项目中触发了任何 WinCC 原生 Logging 调度，弹窗就会出现。 : Resetting the system clock to an earlier
: Certain services like the SmartServer may start automatically and trigger license warnings even if not used in your project.
