| Feature | Fixed (Node-Locked) | Floating (Network) | Subscription (Named-User) | | --- | --- | --- | --- | | | One specific computer only | Any computer on the network, up to concurrent user limit | One specific named user (human), any computer they log into | | Internet required? | No (after activation) | Yes (to check out license from server) | Intermittent (for validation) | | Best for | Dedicated test/workstations, air-gapped systems, long-term projects | Teams sharing licenses across shifts or part-time users | Short-term projects, temp staff, or keeping cash flow flexible | | Cost over 5 years | Lowest (perpetual license + annual maintenance) | Medium (perpetual + maintenance + server admin) | Highest (recurring annual payments never end) | | Transferability | Difficult (requires support ticket) | Easy (just log off/on) | Easy (user changes computer) |
: Many legacy fixed licenses are perpetual, meaning you own the right to use that specific version of OpticStudio indefinitely, even if you stop paying for annual maintenance. Management and Troubleshooting zemax opticstudio license fixed
If you are unsure whether your license is a fixed or subscription type, you can use the Zemax License Manager (or the Ansys License Management tools). Open the Zemax License Manager . Click on the "View License" or "License Information" tab. | Feature | Fixed (Node-Locked) | Floating (Network)
Click to locate your machine's unique ID. Open the Zemax License Manager