| Error | Cause | Solution | |-------|-------|----------| | "Unable to connect to SQL Server" | SQL instance not running | Open Services.msc → Start MSSQL$ASPENV12 | | "License server not found" | Firewall blocking port 27000 | Add inbound rule for lmgrd.exe and aspen_slm.exe | | "Visual Basic Script failed" | Missing C++ Redist | Install vc_redist.x64.exe from installer folder | | "Windows cannot find .DLL" | Antivirus quarantined file | Restore from quarantine and exclude HYSYS folder |
: Most versions of Aspen require a connection to an AspenTech License Manager . Ensure your license server is active and you have the server address ready. how to install aspen hysys v12
: In the product list, ensure Process Modeling (Aspen HYSYS) is selected. You may also want to include Aspen Basic Engineering if you need features like Activated Datasheets. | Error | Cause | Solution | |-------|-------|----------|
Re-enable your antivirus and firewall but add exclusions for: You may also want to include Aspen Basic
Ensure your computer meets the minimum specifications:
If successful, a new simulation window opens without errors.
Are you installing this for or as part of a university/corporate network? Aspen Installation - University Wiki Service