Added new kb article dpl-package-update-failure-license

Author: KB Bot

knowledge-base/dpl-package-update-failure-license.md

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+---
+title: Unable to find package Telerik.Licensing 
+description: Learn how to handle Telerik.Licensing error after upgrade.
+type: troubleshooting
+page_title: Could Not Load File Or Assembly Telerik.Licensing.Runtime, Version 1.4.6.0 Runtime Error
+slug: dpl-package-update-failure-license
+tags: dpl, license, upgrade, fail, nuget, update, load, assembly
+res_type: kb
+ticketid: 1678555
+---
+
+## Environment
+
+| Version | Product | Author | 
+| ---- | ---- | ---- | 
+| Q1 2025| Telerik Document Processing|[Desislava Yordanova](https://www.telerik.com/blogs/author/desislava-yordanova)| 
+
+## Problem
+
+After upgrading the Telerik Document Processing libraries to version [Q1 2025]({%slug release-notes-2025-1-205%}), the following error messages may occur:
+
+* "The file or assembly cannot be loaded 'Telerik.Licensing.Runtime, Version=1.4.6.0, Culture=neutral, PublicKeyToken=token_here' or one of its dependencies. The system cannot find the specified file."
+
+* "NU1101: Unable to find package Telerik.Licensing. No packages exist with this id in source(s): Telerik nuget. PackageSourceMapping is enabled, the following source(s) were not considered: Microsoft Visual Studio Offline Packages, nuget.org. "
+
+## Solution
+
+This may happen if you upgrade to 2025 Q1 from an older version. With [Q1 2025]({%slug release-notes-2025-1-205%}), a new licensing mechanism was introduced, which requires a reference the Telerik.Licensing.Runtime dll.
+
+The recommended way is to ensure that you have added the `Telerik.Licensing` package to your project. This package is necessary for the newer licensing mechanism introduced with the 2025 version.
+
+Refer to the [Setting Up Your Telerik Document Processing Libraries License Key](https://docs.telerik.com/devtools/document-processing/distribution-and-licensing/license-key#license-activation-errors-and-warnings) documentation for details on activating your RadPdfProcessing license key.
+
+Following these steps should resolve the update failure and allow for the successful update of the `Telerik.Documents.Fixed` package to the latest version, while ensuring compliance with the new licensing requirements.
+
+## See Also
+
+- [Licensing Documentation]({%slug license-key%})
+- [Telerik.Licensing NuGet Package](https://www.nuget.org/packages/Telerik.Licensing)