1. In accordance with "FLEXnet Licensing End User Guide" guide (PDF version of this guide can be found in attachment) error codes "FLEXnet licensing error: -15, 10" means the following:
-10: Feature has expired; -15: Cannot connect to license server system. The server (lmgrd) has not been started yet, or the wrong port@host or license file is being used, or the TCP/IP port or host name in the license file has been changed.
Start with these steps: "Stop Server" --> "Start Server" --> "ReRead License File".