Frequently Asked Questions
This article lists the answers to the most frequently asked questions (FAQs) about working with the Telerik Report Server license key.
Does the license key expire?
Yes, the license key expires at the end of your support subscription:
- For trial users, this is at the end of your 30-day trial.
- For commercial license holders, this is when your subscription term expires.
You will need to obtain and install a new license key after starting a trial, renewing a license, or upgrading a license.
An expired perpetual license key is valid for all Telerik Report Server versions installed before its expiration date.
Will the product function with an expired license key?
This depends on your license type.
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Perpetual licenses will continue to function normally with an expired license key.
The following will happen only if you update or install a Report Server version that is released after the expiration date of the license:
- A watermark appears on each report document page
- A warning message similar to the one shown below is logged in the trace log after attaching a Trace Listener to the Report Server Manager and Report Server Agent
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Subscription licenses. The following will happen if you try to run the application:
- A watermark appears on each report document page.
- A warning message similar to the one shown below is logged in the trace log after attaching a Trace Listener to the Report Server Manager and Report Server Agent:
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Trial licenses. The following will happen if you try to run the application:
- A watermark appears on each report document page.
- A warning message similar to the following is logged in the trace log after attaching a Trace Listener to the Report Server Manager and Report Server Agent:
Telerik and Kendo UI Licensing warning TKL002: No Telerik and Kendo UI License file found.
Telerik and Kendo UI Licensing warning TKL002: The following locations were searched:
Telerik and Kendo UI Licensing warning TKL002: * TELERIK_LICENSE (EnvironmentVariable)
Telerik and Kendo UI Licensing warning TKL002: * KENDO_UI_LICENSE (EnvironmentVariable)
Telerik and Kendo UI Licensing warning TKL002: * C:\Program Files (x86)\Progress\Telerik Report Server\Telerik.ReportServer.Web\telerik-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\Program Files (x86)\Progress\Telerik Report Server\Telerik.ReportServer.Web\kendo-ui-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\Program Files (x86)\Progress\Telerik Report Server\Services\telerik-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\Program Files (x86)\Progress\Telerik Report Server\Services\kendo-ui-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\Program Files (x86)\Progress\Telerik Report Server\telerik-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\Program Files (x86)\Progress\Telerik Report Server\kendo-ui-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\Program Files (x86)\Progress\telerik-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\Program Files (x86)\Progress\kendo-ui-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\Program Files (x86)\telerik-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\Program Files (x86)\kendo-ui-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\telerik-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\kendo-ui-license.txt (RecursiveFilePath)
Telerik and Kendo UI Licensing warning TKL002: * C:\Users\user1\AppData\Roaming\Telerik\telerik-license.txt (UserDirectory)
Telerik and Kendo UI Licensing warning TKL002: * C:\Users\user1\AppData\Roaming\Telerik\kendo-ui-license.txt (UserDirectory)
Telerik and Kendo UI Licensing warning TKL002: Activate a License Key file at https://prgress.co/3PBSVoC
Telerik and Kendo UI Licensing warning TKL101: Telerik Reporting is not listed in your current license file.
Telerik and Kendo UI Licensing warning TKL004: Unable to locate licenses for all products.
See the Invalid License section for more information.
Note that future updates of Telerik Report Server may restrict or disable some features when no valid license is present.
I updated the Telerik Report Server and the invalid license errors have appeared. What is the cause of this behavior?
If this happens, the possible reason is that the end date of the license activated in your application is before the release date of the newly installed product. To fix this issue:
- Download a new license key.
- Activate the new license key in your project.
Do I need an Internet connection to activate the license?
No, the license activation and validation are performed entirely offline.
The license is not validated with our services at any point in the project lifecycle.
What happens if both the environment variable and the license key file are present?
If both the TELERIK_LICENSE environment variable and the telerik-license.txt file are present, then the environment variable will be used.
To enforce the use of the license key file, unset the environment variable.
Are earlier versions of Telerik Report Server affected?
No, versions released before January 2025 do not require a license key.