# License Activation Failed

## Explanation This error message arises when attempting to run Theia3D or Theia3D Batch software prior to activating the license on the PC, and includes both of the dialog windows shown above. This usually occurs immediately after installing Theia software on a new PC. ## Possible Solutions To resolve this issue, Theia3D needs to be run with administrator privileges in order to activate the license. Close Theia3D or Theia3D Batch, and then run Theia3D as an administrator by right-clicking on the icon and choosing 'Run as administrator'.

When running Theia3D as an administrator, a prompt to enter the license key will appear, as below. Enter your license key in this window and click Activate. You can access your license key from the [Theia downloads portal](https://service.theiaserver.com/login) using the login information provided at the time of purchase.

If the PC is connected to the internet, the license will automatically activate and Theia3D will open. If the PC is *not* connected to the internet, a dialog window similar to that shown below will appear, indicating that it is necessary to contact Theia support via our [support portal](https://support.theiamarkerless.com/support/home) or emailing .

Manual license activation dialog window. When prompted with this window, please contact support@theiamarkerless.com and provide the license, system, and token information.

After contacting Theia Support, enter the Activation Code as provided by our team and click Activate. The license activation will then be completed, and Theia3D will open. {% hint style="warning" %} If a manual license activation is required, please remember to include the License, System, and Token information provided in the warning dialog when contacting . {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.theiamarkerless.com/troubleshooting/error-messages/license-errors/license-activation-failed.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.