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VS2022 -debugging a function app gives me an error - Unable to attach to CoreCLR. The debugger's protocol is incompatible with the debuggee.

Nagaraj, Prashanth [INSIGHT GLOBAL INC] 0 Reputation points
2024-03-08T10:27:07.2366667+00:00

When I try to debug a function app in Visual Studio 2022, I gives me an error

Unable to attach to CoreCLR. The debugger's protocol is incompatible with the debuggee.

There is no PublishSingleFile in my csproj

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Microsoft Technologies based on the .NET software framework.
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Visual Studio Debugging
Visual Studio Debugging
Visual Studio: A family of Microsoft suites of integrated development tools for building applications for Windows, the web and mobile devices.Debugging: The act or process of detecting, locating, and correcting logical or syntactical errors in a program or malfunctions in hardware. In hardware contexts, the term troubleshoot is the term more frequently used, especially if the problem is major.
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  1. MuthuKumaranMurugaachari-MSFT 22,276 Reputation points
    2024-03-08T14:47:59.19+00:00

    Nagaraj, Prashanth [INSIGHT GLOBAL INC] Thanks for posting your question in Microsoft Q&A. The error message Unable to attach to CoreCLR. The debugger's protocol is incompatible with the debuggee. is usually returned by Visual Studio in a few scenarios (not Azure Functions specific)

    1. If .NET version doesn't match, this might occur, and you need to validate and update to the latest version.
    2. This might also occur if PublishSingleFile is set as true in .csproj but, you mentioned this property is not defined in the file. However, can you try adding the below line in your .csproj and validate if it helps (reference: Publish a single-file app)? Make sure to clean/rebuild the solution.
       <PublishSingleFile Condition="'$(Configuration)' == 'Release'">true</PublishSingleFile>

    This will make sure to enable only for Release not debug. (similar discussion: https://github.com/dotnet/runtime/issues/45382#issuecomment-968600238)

    If both steps don't help or already tried, let us know. I am tagging Visual Studio, .NET team here for any further questions. You can also open a new issue in Visual Studio Developer community similar to this issue with details such as Visual Studio version, .NET version, Function runtime, .csproj details.

    I hope this helps.

    If you found the answer to your question helpful, please take a moment to mark it as Yes for others to benefit from your experience. Or simply add a comment tagging me and would be happy to answer your questions.

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