Here’s a write-up explaining the error in KeyShot, its causes, and step-by-step solutions. KeyShot Error: “The license file is not valid for this computer” – Write-Up 1. Overview When activating KeyShot (especially with a floating or node-locked license), you may encounter the error: “The license file is not valid for this computer.” This prevents KeyShot from running and typically appears after entering a license file ( .lic ) or during network license validation. The error indicates that the license file’s identifying information (e.g., MAC address, hostname, or disk serial number) does not match the current computer’s hardware/software environment. 2. Common Causes | Cause | Description | |-------|-------------| | Incorrect MAC address | The license file is locked to a specific network adapter’s physical address (MAC), but KeyShot is detecting a different one (e.g., virtual adapters, Wi-Fi vs. Ethernet). | | Changed hardware | Replacing a network card, motherboard, or hard drive changes the unique identifiers used by the license. | | Virtual / bridged adapters | Software like VMware, VirtualBox, or Hyper-V creates virtual network adapters that KeyShot may read instead of the physical one. | | Hostname mismatch | Some licenses use the computer name; if the computer name changed, validation fails. | | License file corruption | The .lic file may be malformed or edited incorrectly. | | Floating license server issues | For network licenses, the client may fail to communicate with the license server or the server’s fingerprint changed. | 3. Step-by-Step Troubleshooting Step 1 – Verify the License File’s Locked MAC Address Open the .lic file in Notepad. Look for a line like:
HOSTID=XXXXXXXXXXXX or