Error in log - Ariel.ttf/otf

Question

Error in log - Ariel.ttf/otf

Dani_S 4,501

Hi,

I got this error in log all times, why ?

Thanks,

Dani_S 4,501 Reputation points

2024-12-29T14:14:24.6366667+00:00

The log:

2024-12-29 16:05:30,062 [1] ERROR Microsoft.Maui.FontManager - Error loading font 'Assets/Fonts/Arial.ttf'.

System.ArgumentException: The parameter is incorrect.

Assets/Fonts/Arial.ttf is not a valid absolute URI.

at WinRT.ExceptionHelpers.<ThrowExceptionForHR>g__Throw|39_0(Int32 hr)

at ABI.System.WinRTUriRuntimeClassFactory.CreateUri(String uri)

at ABI.System.Uri.CreateMarshaler(Uri value)

at Microsoft.Graphics.Canvas.Text.CanvasFontSet._ICanvasFontSetFactory.Create(Uri uri)

at Microsoft.Graphics.Canvas.Text.CanvasFontSet.<>c__DisplayClass11_0.<.ctor>b__0()

at Microsoft.Graphics.Canvas.Text.CanvasFontSet..ctor(Uri uri)

at Microsoft.Maui.FontManager.FindFontFamilyName(String fontFile)

2024-12-29 16:05:30,141 [1] ERROR Microsoft.Maui.FontManager - Error loading font 'Assets/Fonts/Arial.otf'.

System.ArgumentException: The parameter is incorrect.

Assets/Fonts/Arial.otf is not a valid absolute URI.

at WinRT.ExceptionHelpers.<ThrowExceptionForHR>g__Throw|39_0(Int32 hr)

at ABI.System.WinRTUriRuntimeClassFactory.CreateUri(String uri)

at ABI.System.Uri.CreateMarshaler(Uri value)

at Microsoft.Graphics.Canvas.Text.CanvasFontSet._ICanvasFontSetFactory.Create(Uri uri)

at Microsoft.Graphics.Canvas.Text.CanvasFontSet.<>c__DisplayClass11_0.<.ctor>b__0()

at Microsoft.Graphics.Canvas.Text.CanvasFontSet..ctor(Uri uri)

at Microsoft.Maui.FontManager.FindFontFamilyName(String fontFile)
Dani_S 4,501 Reputation points

2024-12-29T14:15:25.33+00:00

My fonts folder do not have this font.
Dani_S 4,501 Reputation points

2024-12-29T14:15:44.4133333+00:00

I'm using .NET 8
Dani_S 4,501 Reputation points

2024-12-29T15:01:58.48+00:00
Does this is the solution?

Clear Font Cache:

Sometimes clearing the font cache resolves issues with font errors. Here’s how:

Windows: Navigate to C:\Windows\ServiceProfiles\LocalService\AppData\Local\FontCache and delete the font cache files. Then restart your computer.
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Reputation points Microsoft External Staff

2025-01-03T06:44:32.4666667+00:00

May I know whether your issue has been solved or not? If you're still having problems, please explain in detail what is still going wrong and what you need help with.

1 answer

Your answer

Dani_S 4,501 Reputation points

2024-12-29T14:14:24.6366667+00:00

The log:

2024-12-29 16:05:30,062 [1] ERROR Microsoft.Maui.FontManager - Error loading font 'Assets/Fonts/Arial.ttf'.

System.ArgumentException: The parameter is incorrect.

Assets/Fonts/Arial.ttf is not a valid absolute URI.

at WinRT.ExceptionHelpers.<ThrowExceptionForHR>g__Throw|39_0(Int32 hr)

at ABI.System.WinRTUriRuntimeClassFactory.CreateUri(String uri)

at ABI.System.Uri.CreateMarshaler(Uri value)

at Microsoft.Graphics.Canvas.Text.CanvasFontSet._ICanvasFontSetFactory.Create(Uri uri)

at Microsoft.Graphics.Canvas.Text.CanvasFontSet.<>c__DisplayClass11_0.<.ctor>b__0()

at Microsoft.Graphics.Canvas.Text.CanvasFontSet..ctor(Uri uri)

at Microsoft.Maui.FontManager.FindFontFamilyName(String fontFile)

2024-12-29 16:05:30,141 [1] ERROR Microsoft.Maui.FontManager - Error loading font 'Assets/Fonts/Arial.otf'.

System.ArgumentException: The parameter is incorrect.

Assets/Fonts/Arial.otf is not a valid absolute URI.

at WinRT.ExceptionHelpers.<ThrowExceptionForHR>g__Throw|39_0(Int32 hr)

at ABI.System.WinRTUriRuntimeClassFactory.CreateUri(String uri)

at ABI.System.Uri.CreateMarshaler(Uri value)

at Microsoft.Graphics.Canvas.Text.CanvasFontSet._ICanvasFontSetFactory.Create(Uri uri)

at Microsoft.Graphics.Canvas.Text.CanvasFontSet.<>c__DisplayClass11_0.<.ctor>b__0()

at Microsoft.Graphics.Canvas.Text.CanvasFontSet..ctor(Uri uri)

at Microsoft.Maui.FontManager.FindFontFamilyName(String fontFile)
Dani_S 4,501 Reputation points

2024-12-29T14:15:25.33+00:00

My fonts folder do not have this font.
Dani_S 4,501 Reputation points

2024-12-29T14:15:44.4133333+00:00

I'm using .NET 8
Dani_S 4,501 Reputation points

2024-12-29T15:01:58.48+00:00

Does this is the solution?

Clear Font Cache:

Sometimes clearing the font cache resolves issues with font errors. Here’s how:

Windows: Navigate to C:\Windows\ServiceProfiles\LocalService\AppData\Local\FontCache and delete the font cache files. Then restart your computer.
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Reputation points Microsoft External Staff

2025-01-03T06:44:32.4666667+00:00

May I know whether your issue has been solved or not? If you're still having problems, please explain in detail what is still going wrong and what you need help with.

Answer 1

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Microsoft External Staff

Hello,

This is a non-fatal error, which means an error that does not crash the program at runtime.

This error occurs when a font that does not exist in the Fonts folder is referenced.

For example: If you set the font for a page FontFamily="Arial" and it does not exist, the application will display this error message when it starts and will switch to the default font.

Workaround: Check your xaml page and remove the wrong reference to the font.

Best Regards,

Alec Liu.

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Dani_S 4,501 Reputation points

2024-12-30T02:30:44.0933333+00:00

I do not used Ariel font in my program.
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Reputation points Microsoft External Staff

2024-12-30T05:28:12.8533333+00:00

To investigate further, could you please provide a minimal code example or steps that can reproduce this issue?
Dani_S 4,501 Reputation points

2025-01-03T07:42:26.2833333+00:00

The issue nit solved.where the font come from?
Dani_S 4,501 Reputation points

2025-01-07T11:50:46.04+00:00

where 'Assets/Fonts/Arial.ttf'. asset located in my projet.
Dani_S 4,501 Reputation points

2025-01-07T11:53:14.6+00:00

I used log4net
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Reputation points Microsoft External Staff

2025-01-08T01:51:56.9966667+00:00

You could use Ctrl+Shift+F to search for the Ariel keyword globally in your project. If the font does not exist in the project, it means that some Nuget Packages have caused this problem, and you need to check them one by one.
Dani_S 4,501 Reputation points

2025-01-08T06:41:59.31+00:00
here are my nuget pacages:

<ItemGroup>

<PackageReference Include="Microsoft.Maui.Controls" Version="$(MauiVersion)" /> <PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="$(MauiVersion)" />

<PackageReference Include="CommunityToolkit.Maui" Version="7.0.0" />

<PackageReference Include="System.Management" Version="7.0.2" />

<PackageReference Include="Microsoft.Extensions.Logging.Log4Net.AspNetCore" Version="7.0.0" /> 

<PackageReference Include="Autofac" Version="7.1.0" />

<PackageReference Include="DotNetZip" Version="1.16.0" />

</ItemGroup>
Dani_S 4,501 Reputation points

2025-01-08T06:42:09.8733333+00:00

......
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Reputation points Microsoft External Staff

2025-01-09T01:15:18.9+00:00

Thanks for your feedback.

You could create a new Maui project and then reference these Nuget Packages one by one for testing. If this warning is not found after testing, it means that the font is referenced in your project. Please use Ctrl+Shift+F to search and remove it.

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Error in log - Ariel.ttf/otf

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