Issues after updating BundleTransformer packages in ASP.NET MVC project

[Metinak47]

Hi my friends After updating the BundleTransformer packages in my ASP.NET MVC project, I encountered a critical issue that is preventing the project from running successfully. Prior to the update, I was using BundleTransformer along with JavaScriptEngineSwitcher, and everything was working fine. However, after the update, the project fails to start, and I receive the following error:

Could not load file or assembly 'file:///D:\Project Path\bin\ClearScriptV8.win-x64.dll' or one of its dependencies. The module was expected to contain an assembly manifest.

Troubleshooting Steps Taken: Updated BundleTransformer packages to the latest versions. Updated ClearScriptV8.win-x64.dll to version 7.4.4.0 as specified. Switched from JavaScriptEngineSwitcher.V8.Native.win-x64 to Microsoft.ClearScript.V8.Native.win-x64 as recommended. Despite the changes, the issue persists.

Package Versions Used: ClearScript.V8: 7.4.4.0 MsieJavaScriptEngine: 3.2.2.0 DartSassHost: 1.0.8.0 AutoprefixerHost: 1.1.10.0 BundleTransformer.Core: 1.10.0.0 JavaScriptEngineSwitcher.Core: 3.21.0.0 LibSassHost: 1.2.10.0 System.Text.Encodings.Web: 8.0.0.0 (updated during the process)

Additional Information: The update process for System.Text.Encodings.Web resulted in an error, but the package was successfully updated to version 8.0.0.0.

Request for Assistance: I kindly request assistance in resolving this issue and getting the project back to a stable state. Any guidance on further troubleshooting or specific package versions compatibility would be greatly appreciated.

Thank you for your time and support.

[Daniel15]

Does the ClearScriptV8.win-x64.dll file exist in the bin directory?

[Metinak47]

Yes, it is exist.

[Taritsyn]

Hello!

Starting from version 3.9.0, JavaScriptEngineSwitcher.V8 module is no longer responsible for deploying and loading the native assemblies (corresponding functionality is now implemented in the Microsoft.ClearScript.V8.* packages).

Unfortunately, modern versions of NuGet do not always work stable with .NET Framework projects and because of this, sometimes there are failures after installing packages. Therefore, I recommend you to perform a clean installation:

1. Uninstall the following packages: JavaScriptEngineSwitcher.V8 and Microsoft.ClearScript.*.
2. From the .csproj file, remove lines like these:

   <Import Project="..\packages\Microsoft.ClearScript.V8.Native.win-*\build\Microsoft.ClearScript.V8.Native.win-*.props" Condition="Exists('..\packages\Microsoft.ClearScript.V8.Native.win-*\build\Microsoft.ClearScript.V8.Native.win-*.props')" />
   <Error Condition="!Exists('..\packages\Microsoft.ClearScript.V8.Native.win-*\build\Microsoft.ClearScript.V8.Native.win-*.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Microsoft.ClearScript.V8.Native.win-*\build\Microsoft.ClearScript.V8.Native.win-*.props'))" />

3. Remove the bin and obj directories.
4. Restore a NuGet packages.
5. Install the following packages: JavaScriptEngineSwitcher.V8 and Microsoft.ClearScript.V8.Native.win-x64.

… DartSassHost: 1.0.8.0 … LibSassHost: 1.2.10.0

If you are using the latest version of the BundleTransformer.SassAndScss module, then I recommend that you remove the LibSassHost packages (see the corresponding section of documentation).

[Metinak47]

Thanks for your response.

I uninstalled every thing about BundleTransformer and JavaScriptEngineSwitcher from project. I installed again packages (last version) but I still got error:

Could not load file or assembly 'file:///D:\.Net Project\Project Pathbin\ClearScriptV8.win-x64.dll' or one of its dependencies. The module was expected to contain an assembly manifest.

[Taritsyn]

Try to make a demo console application:

1. Create a project based on the “Console App (.NET Framework)” template.
2. Select a “.NET Framework 4.5” as target framework.
3. Install the Microsoft.ClearScript.V8 and Microsoft.ClearScript.V8.Native.win-x64 packages.
4. Replace a contents of the Program.cs file with code similar to this:

   
   using System;

using Microsoft.ClearScript.V8;

namespace TestClearScriptV8 { internal class Program { static void Main(string[] args) { using (var engine = new V8ScriptEngine()) { var result = (int)engine.Evaluate("2 * 2"); Console.WriteLine("Result: {0}", result); } } } }

 5. Launch the console application.

[Metinak47]

I created a console application and that is works fine! But still I have error in asp.net mvc project (with .net framework 4.7.2)

[Taritsyn]

In unedited version of the previous message it is written:

I create a console application in net framework 4.7.1 and 4.7.2 (I don't have .net framwork 4.5) but I still got error.

Cannot load ClearScript V8 library. Load failure information for ClearScriptV8.win-x86.dll: D:\Sources\ConsoleApp3\bin\Debug\runtimes\win-x86\native\ClearScriptV8.win-x86.dll: The specified module could not be found D:\Sources\ConsoleApp3\bin\Debug\ClearScriptV8.win-x86.dll: The specified module could not be found'

After what changes did the console application start working?

[Metinak47]

That was my mistake and application was x86 then I changed to x64 works fine. But my asp.net project is in x64.

[Taritsyn]

Try installing two packages at once into your web application: Microsoft.ClearScript.V8.Native.win-x86 and Microsoft.ClearScript.V8.Native.win-x64.

[Taritsyn]

If this error still occurs, then try to reproduce the error in the form of simplest demo web application and send me a link to it.

[Metinak47]

I create a simple MVC application and used BundleTransformers. I found my problem. I used V8JsEngine before and that has error for v8-lib-cpp or ClearScript-X64.exe and not workes. I updated all of my packages to last version and used MsieJsEngine for AutoPrefixer jsEngine instead of V8JsEngine and resolved my problem.