This indicates the host ID in the license file does not match the actual machine. To fix this, you must either:
The host ID (MAC) might have changed due to a new network card. On a legitimate license, contact Cadence for a license file regeneration (though very unlikely for such an old version). Alternatively, change your network adapter’s MAC address to match the old one via Device Manager → Advanced → Network Address. Orcad 10.5 License File
Relying on OrCAD 10.5 and its finicky license file is a risk. Consider these options: This indicates the host ID in the license
| Option | Pros | Cons | |--------|------|------| | OrCAD 22.x (Modern) | Full support, new features, Windows 11 native | Expensive subscription | | OrCAD Lite (Free) | Free, no license file hassle | Limited to 100 pins, 2 layers | | KiCad 7/8 | Open source, no licenses, cross-platform | Different UI, migration effort | | Virtual Machine with XP | Keeps legacy license working | Performance overhead | The host ID (MAC) might have changed due
If your only blocker is the license file, you can also convert legacy OrCAD 10.5 schematics to PDF or EDIF and re-enter them into a modern tool.
Do not install the OrCAD products first. Install the Cadence License Manager (version 10.8 or compatible) from your original CD or ISO. Install it to a short path, e.g., C:\Cadence\license_manager.