Article - CS345349
FLEXnet Licensing error: -96, 7 System Error 11001 "Winsock: Host not found" when starting PTC Modeler
Modified: 12-Mar-2026
Applies To
- PTC Modeler 9.0 to 10.2
Description
- License error indicates license server is down or not responding
- Getting below error when starting PTC Modeler:
FLEXnet Licensing error: -96, 7. System Error: 11001"Winsock: Host not found (HOST_NOT_FOUND) - When starting Modeler getting error message
-
License server machine is down or not responding. See the system administrator about starting the license server system, or make sure you're referring the right host (see LM_LICENSE_FILE). Feature: ARTISANRTS Hostname: 00-12-34-56-78-90 ... FLEXnet Licensing error: -96, 7. System Error: 11001"Winsock: Host not found (HOST_NOT_FOUND)" - Unable to start License server for PTC Integrity Modeler service
- PTC Modeler License Server not starting
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