Docx to Pdf convertation exception

GemBox.Document
1

An exception occurs when attempting to convert DOCX to PDF:
System.InvalidOperationException : Cannot get a matching glyph typeface for font 'Calibri'.

HarfBuzzSharp.NativeAssets.Linux - 8.3.1.1
GemBox.Document - 2025.9.108
net 8.0

Code:

    ComponentInfo.SetLicense("FREE-LIMITED-KEY");
    ComponentInfo.FreeLimitReached += (sender, e) => e.FreeLimitReachedAction = FreeLimitReachedAction.ContinueAsTrial;
    var docxStream = File.OpenRead(@"./Resources/TestConvertation.docx");
    docxStream.Position = 0;
    var model = DocumentModel.Load(docxStream, new DocxLoadOptions());

    var result = new MemoryStream();
    model.Save(result, new PdfSaveOptions { ConformanceLevel = PdfConformanceLevel.PdfA1b });

Conversion works without errors on Ubuntu 24.04, but fails when running in Docker. What could be the problem?

Thanks

2

Hi,

The problem occurs because no font files are installed on your Docker image.

Please check our Docker example:

Or our Fonts example:

Does this solve your issue?

Regards,
Mario

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