MAUI app not working in release mode but it works perfectly in debug mode

Question

My MAUI App when running in Debug mode in a emulator is working good but it is not running when I run this in release mode ( does not work either in emulator or a physical device) it crashes.

I am using the Mvvm architecture using a library called CommunityToolkit.Mvvm. I am mentioning this because I do not know if this is causing the problem.

I downloaded an app called Crash Log Viewer in my physical device to inspect the crashes and errors that apps are giving and I got this error:

This information is generated from the Crash Log View application. - https://play.google.com/store/apps/details?id=com.arumcomm.crashlogviewer

Process: com.companyname.ventas_citel
PID: 12230
UID: 10313
Flags: 0x20c8be44
Package: com.companyname.ventas_citel v1 (1.0)
Foreground: No
Process-Runtime: 63820382
Build: samsung/a10sub/a10s:11/RP1A.200720.012/A107MUBU6CVG3:user/release-keys

android.runtime.JavaProxyThrowable: System.FieldAccessException: Field `Microsoft.Maui.Controls.VisualElement:ZIndexProperty' is inaccessible from method `Ventas_Citel.Views.Login.Login:InitializeComponent ()'

   at Ventas_Citel.Views.Login.Login..ctor(LoginViewModel viewModel)
   at System.Reflection.RuntimeConstructorInfo.InternalInvoke(Object , Object[] , Boolean )
   at System.Reflection.RuntimeConstructorInfo.DoInvoke(Object , BindingFlags , Binder , Object[] , CultureInfo )
   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags , Binder , Object[] , CultureInfo )
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite , RuntimeResolverContext )
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2[[Microsoft.Extensions.DependencyInjection.ServiceLookup.RuntimeResolverContext, Microsoft.Extensions.DependencyInjection, Version=7.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60],[System.Object, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].VisitCallSiteMain(ServiceCallSite , RuntimeResolverContext )
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite , RuntimeResolverContext , ServiceProviderEngineScope , RuntimeResolverLock )
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite , RuntimeResolverContext )
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2[[Microsoft.Extensions.DependencyInjection.ServiceLookup.RuntimeResolverContext, Microsoft.Extensions.DependencyInjection, Version=7.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60],[System.Object, System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].VisitCallSite(ServiceCallSite , RuntimeResolverContext )
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c_DisplayClass2_0.<RealizeService>b_0(ServiceProviderEngineScope )
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type , ServiceProviderEngineScope )
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type )
   at Microsoft.Maui.MauiContext.WrappedServiceProvider.GetService(Type serviceType)
   at Microsoft.Maui.Controls.ShellContent.<>c_DisplayClass19_0.<Microsoft.Maui.Controls.IShellContentController.GetOrCreateContent>b_0()
   at Microsoft.Maui.Controls.ElementTemplate.CreateContent()
   at Microsoft.Maui.Controls.Internals.DataTemplateExtensions.CreateContent(DataTemplate self, Object item, BindableObject container)
   at Microsoft.Maui.Controls.ShellContent.Microsoft.Maui.Controls.IShellContentController.GetOrCreateContent()
   at Microsoft.Maui.Controls.Platform.Compatibility.ShellSectionRenderer.OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
   at AndroidX.Fragment.App.Fragment.n_OnCreateView_Landroid_view_LayoutInflater_Landroid_view_ViewGroup_Landroid_os_Bundle_(IntPtr , IntPtr , IntPtr , IntPtr , IntPtr )
   at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PPLLL_L(_JniMarshal_PPLLL_L , IntPtr , IntPtr , IntPtr , IntPtr , IntPtr )
    at crc640ec207abc449b2ca.ShellSectionRenderer.n_onCreateView(Native Method)
    at crc640ec207abc449b2ca.ShellSectionRenderer.onCreateView(ShellSectionRenderer.java:42)
    at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2995)
    at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:523)
    at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:261)
    at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1840)
    at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1764)
    at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1701)
    at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:2849)
    at androidx.fragment.app.FragmentManager.dispatchViewCreated(FragmentManager.java:2777)
    at androidx.fragment.app.Fragment.performViewCreated(Fragment.java:3020)
    at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:551)
    at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:261)
    at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1840)
    at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1764)
    at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1701)
    at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:2849)
    at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:2784)
    at androidx.fragment.app.FragmentController.dispatchActivityCreated(FragmentController.java:262)
    at androidx.fragment.app.FragmentActivity.onStart(FragmentActivity.java:478)
    at androidx.appcompat.app.AppCompatActivity.onStart(AppCompatActivity.java:246)
    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1435)
    at android.app.Activity.performStart(Activity.java:8231)
    at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3872)
    at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:221)
    at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201)
    at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:173)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2336)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:246)
    at android.app.ActivityThread.main(ActivityThread.java:8653)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)

Seems like the error is in the LoginViewModel so I am sharing you my code files:

MauiProgram

    public static class MauiProgram
{
    public static MauiApp CreateMauiApp()
    {
        var builder = MauiApp.CreateBuilder();
        builder.UseMauiApp<App>().UseMauiCommunityToolkit();

        builder
            .UseMauiApp<App>()
            .ConfigureFonts(fonts =>
            {
                fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
            });


        //views
        builder.Services.AddSingleton<Login>();
        builder.Services.AddSingleton<Inventario>();
        builder.Services.AddSingleton<Clientes>();
        builder.Services.AddSingleton<Ventas>();
        builder.Services.AddSingleton<CuentasPorCobrar>();


        //viewModels
        builder.Services.AddSingleton<LoginViewModel>();
        builder.Services.AddSingleton<InventarioViewModel>();
        builder.Services.AddSingleton<ClientesViewModel>();
        builder.Services.AddSingleton<VentasViewModel>();
        builder.Services.AddSingleton<CuentasPorCobrarViewModel>();


        // services
        builder.Services.AddHttpClient<ILoginService, LoginService>();


        return builder.Build();


    }
}

LoginViewModel

public partial class LoginViewModel : BaseViewModel
{
    [ObservableProperty]
    string uuid;

    [ObservableProperty]
    private string _email;

    [ObservableProperty]
    private string _password;

    [ObservableProperty]
    private bool _isEnabled = true;

    private readonly ILoginService _loginService;
    public LoginViewModel(ILoginService loginService)
    {
        ComprobarUUID();
        _loginService = loginService;
        IsEnabled = true;
    }

    private async void ComprobarUUID()
    {
        // .. code
    }

    private async void CargarUUIDPorPrimeraVez()
    {
        // .. code
    }

    [RelayCommand]
    async void Copiar()
    {
        // .. code
    }



}

BaseViewModel

 public partial class BaseViewModel : ObservableObject
    {
        [ObservableProperty]
        private bool _isBusy;

        [ObservableProperty]
        private string _title;
    }

Login.xaml.cs

public partial class Login : ContentPage
{
    public Login(LoginViewModel viewModel)
    {
        InitializeComponent();
        BindingContext = viewModel;
    }
}

I have working so hard in this app and I always been building this app through debug mode but today I had to deliver this app to the team but this did not work.

How do I solve this error? Do you need any more code?

The exception occurs while `Login` page constructor runs `InitializeComponent`. That means something in XAML has caused the problem. Given that it works in debug mode, sounds like a Maui bug. If Alexandar's suggestion doesn't fix, try commenting out stuff in login.xaml, to isolate what line causes it. If you find out what line causes, reduce xaml to minimum that causes crash, then add that complete xaml to question. If no one has a fix, then create a new issue at `github maui issues`. — ToolmakerSteve, Nov 25 '22 at 04:04
@Reyneer, a similar question&answers is here https://stackoverflow.com/questions/74556830/maui-app-failed-to-install-local-device-when-built-in-release-mode/74556855#74556855 — SaddamBinSyed, Nov 25 '22 at 06:30
if you are finding the problem on iOS physical device it could be related to this: https://github.com/dotnet/maui/issues/12316 — Caio, Jan 12 '23 at 15:07

score 10 · Accepted Answer · answered Dec 29 '22 at 07:31

10

Remove zIndex from xaml. and use alternate any approch. i had very bad hours finding out what causing crash in release mode. and this was the fix. can't beleave Maui is in production.

answered Dec 29 '22 at 07:31

Rashid Khan

116
3

score 5 · Answer 2 · answered Nov 25 '22 at 01:16

5

You can try to disable the compiled binding like below:

[XamlCompilation (XamlCompilationOptions.Skip)]
public partial class Login : ContentPage
{
    public Login(LoginViewModel viewModel)
    {
        InitializeComponent();
        BindingContext = viewModel;
    }
}

answered Nov 25 '22 at 01:16

Alexandar May - MSFT

6,536
1
8
15

2

this solved my issue.. but .. why? is this a known issue in maui? – NPadrutt Feb 21 '23 at 20:17

score 2 · Answer 3 · answered Feb 08 '23 at 06:27

I have same issue. In My Case Xaml Error. Below Code has Error.

<StackLayout Orientation="Horizontal"
            RadioButtonGroup.GroupName="interest" 
            RadioButtonGroup.SelectedValue="{Binding rdinterestTaxRATIO}">
<RadioButton Content="15.4%" 
             Value="15.4"
             RadioButtonGroup.GroupName="interest" 
             Margin="15"
             IsChecked="True"/>
<RadioButton Content="1.4%" 
             Value="1.4"
             RadioButtonGroup.GroupName="interest" 
             Margin="15"
             IsChecked="False"/>
<RadioButton Content="0%" 
             Value="0"
             RadioButtonGroup.GroupName="interest" 
             Margin="15"
             IsChecked="False"/>

Below code everything okay

<StackLayout Orientation="Horizontal"
            RadioButtonGroup.GroupName="interest" 
            RadioButtonGroup.SelectedValue="{Binding rdinterestTaxRATIO}">
<RadioButton Content="15.4%" 
                Value="15.4"
                Margin="15"
                IsChecked="True"/>
<RadioButton Content="1.4%" 
                Value="1.4"
                Margin="15"
                IsChecked="False"/>
<RadioButton Content="0%" 
                Value="0"
                Margin="15"
                IsChecked="False"/>

I just delete duplicated property.

score 1 · Answer 4 · answered May 19 '23 at 04:59

In my case, I was only having trouble in Android Platform. The same: debug build worked perfect, but realease build just crashed at startup. The solution for me was to uncheck AOT Compilation in the project properties, which was by default unchecked for debug but checked for release:

score 1 · Answer 5 · edited Jul 22 '23 at 16:55

These answers were ultimately helpful, for me it was also an android only thing, a XAML code error. It would crash on a page that had the incorrect StaticResource set for TextColor.

I was using:
TextColor="{StaticResource PrimaryColor}" when it should have been TextColor="{StaticResource Primary}"

Oddly this worked fine in the debugger but showed the wrong color when deployed to my physical phone. While it is debugging it works fine, but once I disconnect my phone then it would crash. Also I tried to use the app without being connected. Obviously it did not work with Release either.

Hope this helps someone else.

score 1 · Answer 6 · answered Aug 05 '23 at 14:58

Adding "[XamlCompilation (XamlCompilationOptions.Skip)]" in the MainPage.xaml.cs file write above the class statement and disabling the AOT switches in the project properties worked great for me too.

first part of my MainPage file:

namespace your_namespace

{

[XamlCompilation(XamlCompilationOptions.Skip)]

public partial class MainPage : ContentPage

{

MAUI app not working in release mode but it works perfectly in debug mode

6 Answers6

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