Saturday, May 27, 2023

Unable to load DLL 'SQLite.Interop.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

 The error message you encountered, "Unable to load DLL 'SQLite.Interop.dll': The specified module could not be found," suggests that the required SQLite interop DLL is missing or cannot be located by your application.

To resolve this issue, you can try the following solutions:

  1. Ensure that the SQLite interop DLL (SQLite.Interop.dll) is present in your application's output directory:

    • If you are building a console application, make sure that the DLL is copied to the output directory (e.g., bin\Debug or bin\Release) alongside your application's executable file.
    • If you are working with a different project type, such as a class library or ASP.NET project, ensure that the DLL is present in the appropriate output directory.

  2. Check that the correct version of the SQLite interop DLL is used:

    • Ensure that you are using the appropriate version of the SQLite interop DLL that matches your application and the version of System.Data.SQLite you are using.
    • If you have multiple versions of the DLL in your project, remove any unnecessary versions and ensure that the correct version is referenced.

  3. Verify that the SQLite interop DLL is deployed with your application:

    • If you are deploying your application to another machine or environment, ensure that the SQLite interop DLL is included in the deployment package.
    • If necessary, manually copy the SQLite interop DLL to the target machine or deployment location alongside your application's executable file.

  4. Check the platform target of your application:

    • Ensure that your application is built for the correct platform (x86 or x64) to match the SQLite interop DLL.
    • If your application is targeting a different platform, it may not be able to load the DLL correctly.

  5. If you are using a web application or hosting environment:

    • Ensure that the required DLL is present in the correct directory on the web server or hosting environment.
    • Check the application's bin folder or the appropriate location specified by your hosting environment.

By following these steps, you should be able to resolve the "Unable to load DLL 'SQLite.Interop.dll'" issue. Ensure that the SQLite interop DLL is accessible and correctly referenced in your project or deployed alongside your application.