stride3d/stride · error · ContentManagerException

Unexpected exception while loading asset

Error message

Unexpected exception while loading asset [{url}]. Reason: {exception.Message}. Check inner-exception for details.

What it means

Wrapper exception in ContentManager.DeserializeObject: an unexpected exception escaped while deserializing the content stream for the url. The original exception is preserved as the inner exception; the message just records which asset failed and why.

Solutions

1. Inspect and address the inner exception, which carries the actual failure
2. Verify the asset file is not corrupted or truncated
3. Check for missing serializers/types registered in AssemblyRegistry for the asset's type

When it happens

Trigger: Thrown at sources/core/Stride.Core.Serialization/Serialization/Contents/ContentManager.cs:500 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of stride3d/stride@96fad776d2 (2026-09-14). Data as JSON: /api/errors/fa07a3ecc5b78dfe. Report an issue: GitHub.

Appendix: source

Thrown at sources/core/Stride.Core.Serialization/Serialization/Contents/ContentManager.cs:500

                SetAssetObject(reference, result);
            }
            else
            {
                result = reference.Object;
            }

            reference.Deserialized = true;

            PrepareSerializerContext(contentSerializerContext, streamReader.Context);

            contentSerializerContext.SerializeContent(streamReader, serializer, result);

            // Add reference
            parentReference?.References.Add(reference);
        }
        catch (Exception exception)
        {
            throw new ContentManagerException($"Unexpected exception while loading asset [{url}]. Reason: {exception.Message}. Check inner-exception for details.", exception);
        }

        if (settings.LoadContentReferences)
        {
            // Process content references
            // TODO: Should we work at ChunkReference level?
            foreach (var contentReference in contentSerializerContext.ContentReferences)
            {
                bool shouldBeLoaded = true;

                //Reference childReference;

                settings.ContentFilter?.Invoke(contentReference, ref shouldBeLoaded);

                if (shouldBeLoaded)
                {
                    serializeOperations.Enqueue(new DeserializeOperation(reference, contentReference.Location, contentReference.Type, contentReference.ObjectValue));
                }

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