Error: "The Microsoft SQL Server 2014 System CLR Types are required."
: The latest minor version in this series is 12.0.2402.15 . Critical Prerequisites
Required for applications developed with SQL Server 2014 Reporting Services or Visual Studio 2015. Why You Need the Report Viewer 2015 Runtime
Microsoft Report Viewer version 12.0.0.0 is a significant release that offers several enhancements and improvements over its predecessors. Some of the key features of this version include:
Execute the following command to install the official Microsoft package matching version 12: microsoft report viewer version 12.0.0.0 download
Restart your application or IIS server (if deploying a web application) to ensure the Global Assembly Cache (GAC) registers the new DLLs. Troubleshooting Common Errors
Yes. To maintain a secure and well-supported application, migrating to the NuGet-based packages is strongly recommended.
If you are looking for (e.g., for VS 2017/2019/2022) or are having trouble with a specific assembly error , I can help you find the appropriate package.
Use code with caution. Choosing Between Version 12.0.0.0 and Newer Versions Error: "The Microsoft SQL Server 2014 System CLR
While version 12.0.0.0 is highly stable for older .NET environment projects, Microsoft has shifted newer report management tools entirely over to NuGet. If you plan to upgrade your application to .NET Core or .NET 5/6/7/8 frameworks, note that the native 12.0.0.0 installer will not support these core environments. You will need to look into modern replacements such as the official Microsoft.ReportingServices.ReportViewerControl.Winforms NuGet packages, which support modern framework runtimes.
Need help? Leave a comment below or contact Microsoft Support for paid assistance with legacy components.
Enables printing, zooming, searching, and exporting reports to formats like PDF, Excel, and Word.
Windows 7, Windows 8, Windows Server 2008 R2, Windows Server 2012. Some of the key features of this version
No, extended support ended on October 14, 2025 . Microsoft no longer provides security updates or fixes for this runtime.
I can provide the exact configuration snippets or deployment steps for your environment. Share public link
: This is a critical dependency for the Report Viewer 2015 Runtime. It must be installed before the Report Viewer package. Installation Tips
: In newer versions of Visual Studio, the Report Viewer control may not appear in the toolbox automatically. You may need to manually add the DLLs by right-clicking the Toolbox , selecting Choose Items , and browsing to the installed NuGet package location.