Aspen Hysys License Checkout Failed |link| Now

Verify that the server name listed matches your current corporate license server.

| Error Message Subtext | Likely Cause | | :--- | :--- | | "No such feature exists" | Wrong license file or product version mismatch. | | "Cannot connect to license server" | Network issue, firewall blocking port, or server down. | | "License server machine is down or not responding" | DNS resolution failure. | | "All licenses are in use" | No concurrent seats available. | | "The license file has been corrupted" | Corrupted local trust cache. | | "User/host not authorized" | User is not in the license server's inclusion list. |

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Check your Windows Environment Variables. Search for "Edit the system environment variables" in your Windows start menu, click , and look for LSHOST or APSV_LICENSE_SERVER . Ensure the value matches your server details. 3. Review Firewall and Port Settings

Check the expiration date of the Aspen Hysys feature strings. Verify that the server name listed matches your

The Sentinel RMS License Manager typically communicates over . Ensure that your local Windows Firewall and corporate network firewalls have an inbound/outbound exception rule for this port. 5. Summary Checklist Diagnostic Step Action Required Target System Ping Server Check network/VPN connection Workstation Restart Service Start Sentinel RMS License Manager System Variables Set LSHOST to correct IP/Host Workstation Check Expiration Verify dates via Aspen License Utility Open Ports Allow UDP port 5093 through firewalls

Run this on the license server:

Sometimes, corrupted temporary licensing data prevents a successful handshake. Close all AspenTech applications.

Ensure (the default port for Sentinel RMS) is open for inbound and outbound traffic on both the client and the server. | | "License server machine is down or

Details:

The computer cannot reach the license server (common with VPNs or firewalls).