Aspen Hysys License Checkout Failed

A "License Checkout Failed" error in Aspen HYSYS typically occurs when the software cannot verify a valid license through the AspenTech Software License Manager (SLM). This can stem from connection issues, exhausted license pools, or incorrect system configurations. Common Causes & Solutions Potential Solution All Licenses in Use

Are you using a standalone local license or a shared network server? Software License Manager (SLM) - AspenTech Support Center Aspen Hysys License Checkout Failed

: If your institution uses a token-based system, all available licenses may be in use by other users. Try waiting or asking colleagues to close unused sessions. Troubleshooting Steps Summary Potential Resolution Verify Network Ensure VPN or LAN connection to the server is active. Check SLM Status A "License Checkout Failed" error in Aspen HYSYS

Diagnostic steps (ordered, actionable)

Capture exact error message and codes shown by HYSYS and license manager logs.
Verify network reachability:
Click the Configure button to launch the SLM Configuration Wizard. Capture exact error message and codes shown by
- Open license file, check expiration dates, feature names, and total seats.
- Verify feature names requested by HYSYS match entries in license file.
Service Failures: The Sentinel RMS License Manager or Aspen SLM service is not running on the host or server machine.

Under System Variables, create a new variable named LSHOST and set its value to your license server's hostname. Address Token Leaks