etabs license not recognized error 120
 
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Etabs License Not Recognized Error 120

ETABS License Not Recognized — Error 120 Summary: ETABS error 120 ("License not recognized") indicates the software cannot detect or validate a valid license. Below is a concise diagnostic checklist, step-by-step fixes (ordered by likelihood), verification steps, and an escalation/log template you can use when contacting support. Immediate checks (quick wins)

Confirm license type: Floating (network) vs. standalone. Check license server status: Is the license server machine powered on and reachable? Verify network connectivity: Ping the license server from the ETABS client machine. Firewall/antivirus: Ensure ports used by the license server are allowed (commonly UDP/TCP 27000–27009 or vendor-specified). Date/time: Confirm client and server clocks are correct and time zones consistent. License expiry: Confirm license has not expired.

Step-by-step troubleshooting (do these in order)

Restart services:

On license server: restart the license service/daemon (e.g., FLEXnet/ELicense service). On client: restart ETABS and, if needed, reboot the client machine.

Verify server process and ports:

On server: confirm the license manager process is running (use Task Manager / systemctl / ps as appropriate). Use netstat (or equivalent) to confirm the license ports are listening. etabs license not recognized error 120

Test connectivity:

From client: ping server IP/hostname. From client: attempt telnet serverIP port (use the license port) or nc to test TCP reachability.

Confirm license file / server name:

Ensure ETABS client license configuration points to the correct license server name/IP and port. Use IP rather than hostname if DNS might be an issue.

DNS and hostname: