Ask your IT department or lab supervisor: Is the license server powered on? If a summer storm took down the server room, no amount of clicking will help.
The Aspen License Administration service or Sentinel RMS Daemon has stopped running on the host server.
Are you using a license or a standalone/node-locked dongle? Are you connected via a corporate VPN ? What version of Aspen HYSYS are you currently running?
If the tool shows "Expired," you will need to request a new license file from AspenTech Support or your administrator. If you'd like to troubleshoot further, let me know: Are you using a Standalone (local) or (server-based) license? of HYSYS are you running (e.g., V11, V12)? Did this start after a Windows update or hardware change? How to resolve Aspen Hysys license checkout failed error?
If multiple users are experiencing the same checkout failure simultaneously, the issue is likely rooted on the server itself. Log into the host license server as an administrator. Open the snap-in ( services.msc ).
The license file may be outdated and not support the newer version of HYSYS being launched. Troubleshooting Steps Verify Server Configuration Open the AspenONE SLM License Manager from the Start menu.
A "token leak" in some versions (e.g., v14.5 or v15.0) can cause tokens to remain checked out even after the application closes, eventually exhausting the pool.
Aspen HYSYS relies on system variables to locate its operational tokens.
: If the license server isn't found, you may need to manually point the software to it: Right-click My Computer Properties Advanced system settings Environment Variables System variables , create a variable named
Ensure you are connected to your organization’s if working remotely, as most institutional licenses require a direct network handshake.
View your installed features to check the expiration column.
| Error Code | Description | Typical Cause | |:-----------|:------------|:--------------| | Code 18 | “The license for this product or feature could not be found” | License file missing, incorrect license server configuration, or SLM pointing to wrong license source | | Code 5 | “Network license server is not running on the specified machine” | License server is down, unreachable, or firewall is blocking communication | | Code 26 | “This license is currently disabled due to an inconsistency in the computer‘s system clock” | System date/time is incorrectly set or has been modified after license installation | | Code 96/86 | “License file invalid or signature error” | Corrupted license file or license generated on a different machine | | Code 97/5 | “Server hostname/IP mismatch” | License file contains incorrect SERVER hostname or IP address information |