We have some long-time project with standalone PI server. We had moved (reinstalled) PI System to another machine without updating license. After it we had some messages about license mismatch 50% (or more), but PI System software were working with no any problems on new machine. We successfully worked with new machine several months. Then we switched server off for about half a year. And when we switched server on again, we had some issues with software, there is error message in PI SDK Utility: License machine mismatch [-12209] amount or another mismatch. Service PI License manager pilicmgr in not running. Command “Piartool -lic usage” gives: Failed to register with license manager: [-10727] PINET RPC is non-existant. We cannot connect to PI server in SMT. Our license is bounded with hardware, so we know, that we need to update license. But why all worked correct in first months after moving to new machine? May be there is some period of time, when license proceeds to work, and at the end of this period license stops to work?