Unable to use "dotnet run" in 32bit Application in ubantu machine

Aditya Dalai 25

Currently I am trying to run my dotnet core in 32bit Console App in Linux (Ubantu) below is the code base of my Console App

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net6.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
		<DebugSymbols>true</DebugSymbols>
		<OutDir>_Out\Debug\</OutDir>
		<DefineConstants>TRACE;DEBUG;TEST</DefineConstants>
		<CodeAnalysisModuleSuppressionsFile>GlobalSuppressions.cs</CodeAnalysisModuleSuppressionsFile>
		<ErrorReport>prompt</ErrorReport>
        <PlatformTarget>x86</PlatformTarget>
		<Prefer32Bit>false</Prefer32Bit>
	</PropertyGroup>

</Project>

I am able to build it by using dotnet build command. User's image

but while using dotnet run in debug mode I am unable to run it I am getting below exception .

User's image

Could you please suggest me how Can I fix this issue .

Om Patil 5 Reputation points

2024-01-03T09:24:58.35+00:00
It seems like you're encountering an issue when trying to run your 32-bit Console App in Ubuntu using `dotnet run`. The error message indicates an issue with loading the native dependencies. Here are a few suggestions to help you resolve this issue: 1. **Check Dependencies:** Ensure that all the native dependencies required by your application are available in 32-bit versions on your Ubuntu machine. Sometimes, issues arise when the necessary libraries are missing or incompatible. 2. **32-bit Libraries:** On a 64-bit Ubuntu system, you may need to install the 32-bit compatibility libraries. You can try installing them using the following command: ```bash sudo dpkg --add-architecture i386 sudo apt-get update sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386

Console App Configuration: Ensure that your Console App is correctly configured to use 32-bit as specified in your project file. You've already set the <PlatformTarget> to x86, which is correct. Also, ensure that <Prefer32Bit> is set to true if you want to prefer 32-bit when targeting AnyCPU.

Runtime Identifier (RID): When targeting 32-bit on Linux, the Runtime Identifier (RID) might be important. You can specify the RID in your build command. For example:
dotnet run --runtime linux-x86
Replace linux-x86 with the appropriate RID for your target environment.

Executable Permission: Ensure that the generated executable has the necessary permissions to be executed. You can use the chmod command to set the executable permission:
chmod +x path/to/your/executable

Check Mono Compatibility: If you are targeting a Linux system and using specific libraries, make sure that those libraries are compatible with Mono, which is used by .NET on Linux. Some libraries may have issues when running in a 32-bit Mono environment.

Consider Using Docker: If the above steps don't resolve the issue, consider running your application inside a Docker container. Docker provides a more controlled and isolated environment, which can help with dependency issues.

After trying these suggestions, attempt to run your application again using dotnet run. If the issue persists, you may want to investigate further into the specific dependencies and their compatibility with your target environment.
Aditya Dalai 25 Reputation points

2024-01-03T10:15:15.4566667+00:00
Hi @Om Patil ,

while running this dotnet run --runtime linux-x86 I am getting errors , could you please suggest me how can I find the appropriate RID of my machine I Have used this command dotnet --list-runtimes

this give me only this information In my Ubantu

so can you tell me how can I find my RID to run this command

dotnet run --runtime linux-x86
Jiale Xue - MSFT 46,466 Reputation points Microsoft Vendor

2024-01-04T14:15:46.2233333+00:00
Hi @Aditya Dalai , Welcome to Microsoft Q&A,

It is recommended that you use it directly

dotnet runmyapp.dll

https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-run

The command is used in the context of projects, not built assemblies. If you're trying to run a framework-dependent application DLL instead, you must use dotnet without a command. For example, to run , use:dotnet runmyapp.dll

Or:

cd /path/to/your/project dotnet run -c Debug -r linux-x86

Best Regards,

Jiale

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Aditya Dalai 25 Reputation points

2024-01-08T06:00:37.31+00:00

Hi @Jiale Xue - MSFT

thanks a lot for your suggestion but after running the above command on my ubantu machine .I am getting the error where it is not able to getting RID Linux-x86 is missing in my case .could you please help me installing this particular RID Linux-x86 (on ubantu).

Welcome to .NET 6.0!

SDK Version: 6.0.125

Installed an ASP.NET Core HTTPS development certificate.

To trust the certificate run 'dotnet dev-certs https --trust' (Windows and macOS only).

Learn about HTTPS: https://aka.ms/dotnet-https

Write your first app: https://aka.ms/dotnet-hello-world

Find out what's new: https://aka.ms/dotnet-whats-new

Explore documentation: https://aka.ms/dotnet-docs

Report issues and find source on GitHub: https://github.com/dotnet/core

Use 'dotnet --help' to see available commands or visit: https://aka.ms/dotnet-cli

/usr/lib/dotnet/sdk/6.0.125/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(129,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'linux-x86'. [/home/simu_linux/Test/Myapp/Myapp.csproj]

/usr/lib/dotnet/sdk/6.0.125/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(129,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'linux-x86'. [/home/simu_linux/Test/Myapp/Myapp.csproj]

/usr/lib/dotnet/sdk/6.0.125/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(129,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'linux-x86'. [/home/simu_linux/Test/Myapp/Myapp.csproj]

/usr/lib/dotnet/sdk/6.0.125/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(129,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'linux-x86'. [/home/simu_linux/Test/Myapp/Myapp.csproj]

The build failed. Fix the build errors and run again.

The List of RIDs availables

I have attached the error messages and the list of RIDs.
Aditya Dalai 25 Reputation points

2024-01-24T06:17:59.69+00:00

Hi @Jiale Xue - MSFT Is there anything that I am missing in my configuration , because through mono I am able to run the 32bit app in Linux by using mono MyApp.dll . but through mono some library are not working EX . System.IO so could you suggest me some documentation for running a simple 32bit .net console app in Linux. actually people are saying There are no official builds for Linux x86. also is it true ?

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