Build fail for project in Android [.NET 8]

Question

Good morning, I have a perfectly working MAUI project developed with .NET7 that I decided to migrate to .NET8. However, I am unable to publish in Release, while in Debug it works correctly. Good morning, I have a perfectly working MAUI project developed with .NET7 that I decided to migrate to .NET8. However, I am unable to publish in Release, while in Debug it works correctly. these are the errors I get. Any suggestions? Error Precompiling failed for C:\WorkingFolders\Kering-APEEvo\src\APEEvo.Mobile\APEEvo.Mobile\obj\Release\net8.0-android\android-arm64\aot-in\Microsoft.VisualBasic.Core.dll with exit code 1. Can not open image obj\Release\net8.0-android\android-arm64\aot-in\Microsoft.VisualBasic.Core.dll APEEvo.Mobile C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.0.52\targets\Microsoft.Android.Sdk.Aot.targets 109 Error Precompiling failed for C:\WorkingFolders\Kering-APEEvo\src\APEEvo.Mobile\APEEvo.Mobile\obj\Release\net8.0-android\android-arm64\aot-in\System.AppContext.dll with exit code 1. Can not open image obj\Release\net8.0-android\android-arm64\aot-in\System.AppContext.dll APEEvo.Mobile C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.0.52\targets\Microsoft.Android.Sdk.Aot.targets 109 Error Precompiling failed for C:\WorkingFolders\Kering-APEEvo\src\APEEvo.Mobile\APEEvo.Mobile\obj\Release\net8.0-android\android-arm64\aot-in\System.ComponentModel.Annotations.dll with exit code 1. Can not open image obj\Release\net8.0-android\android-arm64\aot-in\System.ComponentModel.Annotations.dll APEEvo.Mobile C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.0.52\targets\Microsoft.Android.Sdk.Aot.targets 109 Error Precompiling failed for C:\WorkingFolders\Kering-APEEvo\src\APEEvo.Mobile\APEEvo.Mobile\obj\Release\net8.0-android\android-arm\aot-in\Microsoft.VisualBasic.Core.dll with exit code 1. Can not open image obj\Release\net8.0-android\android-arm\aot-in\Microsoft.VisualBasic.Core.dll APEEvo.Mobile C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.0.52\targets\Microsoft.Android.Sdk.Aot.targets 109 Error Precompiling failed for C:\WorkingFolders\Kering-APEEvo\src\APEEvo.Mobile\APEEvo.Mobile\obj\Release\net8.0-android\android-x64\aot-in\Microsoft.VisualBasic.Core.dll with exit code 1. Can not open image obj\Release\net8.0-android\android-x64\aot-in\Microsoft.VisualBasic.Core.dll APEEvo.Mobile C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.0.52\targets\Microsoft.Android.Sdk.Aot.targets 109 Error Precompiling failed for C:\WorkingFolders\Kering-APEEvo\src\APEEvo.Mobile\APEEvo.Mobile\obj\Release\net8.0-android\android-x64\aot-in\System.AppContext.dll with exit code 1. Can not open image obj\Release\net8.0-android\android-x64\aot-in\System.AppContext.dll APEEvo.Mobile C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.0.52\targets\Microsoft.Android.Sdk.Aot.targets 109 Error Precompiling failed for C:\WorkingFolders\Kering-APEEvo\src\APEEvo.Mobile\APEEvo.Mobile\obj\Release\net8.0-android\android-x64\aot-in\System.ComponentModel.Annotations.dll with exit code 1. Can not open image obj\Release\net8.0-android\android-x64\aot-in\System.ComponentModel.Annotations.dll APEEvo.Mobile C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.0.52\targets\Microsoft.Android.Sdk.Aot.targets 109 Error Precompiling failed for C:\WorkingFolders\Kering-APEEvo\src\APEEvo.Mobile\APEEvo.Mobile\obj\Release\net8.0-android\android-x86\aot-in\Microsoft.VisualBasic.Core.dll with exit code 1. Can not open image obj\Release\net8.0-android\android-x86\aot-in\Microsoft.VisualBasic.Core.dll APEEvo.Mobile C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.0.52\targets\Microsoft.Android.Sdk.Aot.targets 109 Error Precompiling failed for C:\WorkingFolders\Kering-APEEvo\src\APEEvo.Mobile\APEEvo.Mobile\obj\Release\net8.0-android\android-x86\aot-in\System.AppContext.dll with exit code 1. Can not open image obj\Release\net8.0-android\android-x86\aot-in\System.AppContext.dll APEEvo.Mobile C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.0.52\targets\Microsoft.Android.Sdk.Aot.targets 109 Error Precompiling failed for C:\WorkingFolders\Kering-APEEvo\src\APEEvo.Mobile\APEEvo.Mobile\obj\Release\net8.0-android\android-x86\aot-in\System.ComponentModel.Annotations.dll with exit code 1. Can not open image obj\Release\net8.0-android\android-x86\aot-in\System.ComponentModel.Annotations.dll APEEvo.Mobile C:\Program Files\dotnet\packs\Microsoft.Android.Sdk.Windows\34.0.52\targets\Microsoft.Android.Sdk.Aot.targets 109

Answer 1

Hello, Based on your error, this issue is related to the AOT. please right click your project, choose property. Open the Android selection->choose Options-> Find the AOT-> Un-select the Release & net8.0-android. After that, please close your VS and open your project folder, delete the bin and obj folder and open your project with VS, rebuild your project and release it. Best Regards, Leon Lu

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