Deploying to iOS crashes with System.IO.FileNotFoundException

[Varmod]

I've made a Maui app and developed it using the android emulator where it runs without a problem. However when trying to deploy the app to my iPhone the app crashes during the App class's InitializeComponent() with the error System.IO.FileNotFoundException: "System.Private.CoreLib.resources" before it terminates.

To make things even stranger, when I open the source code on my mac and try to deploy from there the code won't even build. App.xaml throws errors "XLS0414: The type 'Color' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built."

I've tried looking into the possibility of a missing reference but Microsoft.Maui.Graphics looks like a core assembly so I'm not sure how I would be able to remove it the first place.

I've also tried all the standard things like cleaning the solution and rebuilding. Also I created a new project where I migrated all my code in case the issue was from upgrading the project from maui6 to 7, but that didn't help either.

---

VisualStudio Version 17.5.1 (17.5.2 on Mac)
Maui ios 16.2.1024/7.0.100 (16.2.1040/7.0.100 on Mac)

[jfversluis]

Does a File > New .NET MAUI Project work? In other words: in this specific to something in your code or project?

This problem will be very hard to diagnose without more investigation on your part I'm afraid. Would you be able to provide at least a binlog of your build maybe?

Thanks!

Hi @Varmod. We have added the "s/needs-info" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[Varmod]

Sure thing, here's the build:

build.txt

and here's also a bit from from the debug output

...
Loaded assembly: /private/var/containers/Bundle/Application/.../PosunkujHravo.app/System.Runtime.InteropServices.RuntimeInformation.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/.../PosunkujHravo.app/Microsoft.Extensions.Logging.Debug.dll [External]
Thread started: #2
Resolved pending breakpoint for 'PosunkujHravo.Program.Main(System.String[])' to C:\Users\varmod\source\repos\PosunkujHravo\PosunkujHravo\Platforms\iOS\Program.cs:10 [0x00000].
Loaded assembly: data-0x10ae40000 [External]
Loaded assembly: data-0x10ae54000 [External]
Resolved pending breakpoint for 'Xamarin.HotReload.HotReloadAgent.BreakpointSendToIde(System.String)' to D:\a_work\1\s\HotReload\Source\Xamarin.HotReload.Agent\HotReloadAgent.cs:423 [0x00000].
Loaded assembly: /private/var/containers/Bundle/Application/.../PosunkujHravo.app/System.Text.Json.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/.../PosunkujHravo.app/System.Text.Encodings.Web.dll [External]
Resolved pending breakpoint for 'Xamarin.HotReload.HotReloadAgent.BreakpointCheckpoint()' to D:\a_work\1\s\HotReload\Source\Xamarin.HotReload.Agent\HotReloadAgent.cs:418 [0x00000].
System.IO.FileNotFoundException: 'Loading...'

The app has been terminated.

[Varmod]

accidently closed the issue

[Varmod]

So in the end the error message was not connected to the black screen but to something else, not sure yet as the error message is not really helpful.

The black screen was due to me referencing an icon.svg as a svg instead of png in my xaml. The icon was used in the navbar of the AppShell and the crash said that it couldn't load the icon.svg file.

[marktopley]

I was stuck with a similar issue, ran fine on Windows but Android and iOS both threw 1st chance exceptions FileNotFoundException from InitializeComponent() in App.xaml.cs. Even with FileNotFound exception not set in Debugger options. I found after much pain that deleting the .vs folder next to my solution fixed the issue.

[TAMHAN]

Hello,
this issue now also showed up for me. The program works well on Windows and Android, but dies on iOS after I managed to compile and deploy it for the first time.

After I set System.Exception as critical for the debugger, I get the same error from the esteemed colleagues:

	Name	Wert	Typ
◢	$exception	{System.IO.FileNotFoundException: File name: 'System.Private.CoreLib.resources' at System.Reflection.Assembly.Load(AssemblyName assemblyRef, StackCrawlMark& stackMark, AssemblyLoadContext assemblyLoadContext) at System.Reflection.RuntimeAssembly.InternalGetSatelliteAssembly(Assembly assembly, CultureInfo culture, Version version, Boolean throwOnFileNotFound)}	System.IO.FileNotFoundException

Interestingly, the exception window closes itself after about 20 seconds. Hitting the copy to clipboard button raises a Windows error.

The line which crashes is this:
public partial class App : Application
{
public Plugin.BLE.Abstractions.Contracts.IService myBTLEService;
private bool myControlFlag = false;
public App()
{
InitializeComponent(); // HERE

	MainPage = new AppShell();
}

Sorry for being annoying, but I really need help for my client!

[TAMHAN]

Hello,
here is the invocation list:
[External Code]
0xC in BopSyncNetPOC.App.InitializeComponent at C:\Users\tamha\source\repos\BopSyncNetPOC\BopSyncNetPOC\Microsoft.Maui.Controls.SourceGen\Microsoft.Maui.Controls.SourceGen.CodeBehindGenerator\App.xaml.sg.cs:22,4 C#

0x10 in BopSyncNetPOC.App..ctor at C:\Users\tamha\source\repos\BopSyncNetPOC\BopSyncNetPOC\App.xaml.cs:11,3 C#
0xD in BopSyncNetPOC.Program.Main at C:\Users\tamha\source\repos\BopSyncNetPOC\BopSyncNetPOC\Platforms\iOS\Program.cs:13,3 C#