{"record":{"id":"e85f77c88b38082e","repo":"stride3d/stride","slug":"unable-to-find-a-serializer-for-0","errorCode":null,"errorMessage":"Unable to find a serializer for [{0}]","messagePattern":"Unable to find a serializer for \\[(.+?)\\]","errorType":"exception","errorClass":"InvalidOperationException","httpStatus":null,"severity":"error","filePath":"sources/assets/Stride.Core.Assets/AssetFileSerializer.cs","lineNumber":102,"sourceCode":"    /// </summary>\n    /// <typeparam name=\"T\">Type of the asset</typeparam>\n    /// <param name=\"filePath\">The file path.</param>\n    /// <param name=\"log\">The logger.</param>\n    /// <returns>An instance of Asset not a valid asset asset object file.</returns>\n    public static AssetLoadResult<T> Load<T>(string filePath, ILogger? log = null, string? assetNamespace = null)\n    {\n        using var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);\n        var result = Load<T>(stream, filePath, log, assetNamespace);\n        return result;\n    }\n\n    public static AssetLoadResult<T> Load<T>(Stream stream, UFile filePath, ILogger? log = null, string? assetNamespace = null)\n    {\n        ArgumentNullException.ThrowIfNull(filePath);\n        var assetFileExtension = Path.GetExtension(filePath).ToLowerInvariant();\n\n        var serializer = FindSerializer(assetFileExtension)\n            ?? throw new InvalidOperationException(\"Unable to find a serializer for [{0}]\".ToFormat(assetFileExtension));\n        var asset = (T)serializer.Load(stream, filePath, log, true, out var aliasOccurred, out var yamlMetadata, assetNamespace);\n        return new AssetLoadResult<T>(asset, log, aliasOccurred, yamlMetadata);\n    }\n\n    /// <summary>\n    /// Serializes an <see cref=\"Asset\" /> to the specified file path.\n    /// </summary>\n    /// <param name=\"filePath\">The file path.</param>\n    /// <param name=\"asset\">The asset object.</param>\n    /// <param name=\"yamlMetadata\"></param>\n    /// <param name=\"log\">The logger.</param>\n    /// <exception cref=\"System.ArgumentNullException\">filePath</exception>\n    public static void Save(string filePath, object asset, AttachedYamlAssetMetadata? yamlMetadata, ILogger? log = null, string? assetNamespace = null)\n    {\n        ArgumentNullException.ThrowIfNull(filePath);\n\n        // Creates automatically the directory when saving an asset.\n        filePath = FileUtility.GetAbsolutePath(filePath);","sourceCodeStart":84,"sourceCodeEnd":120,"githubUrl":"https://github.com/stride3d/stride/blob/96fad776d210c221682aac1ccdf4c79dc046fc38/sources/assets/Stride.Core.Assets/AssetFileSerializer.cs#L84-L120","documentation":"Load looks up a serializer by the file extension of the path passed in; FindSerializer returned null because no registered serializer handles that extension. The library only knows how to load assets whose extension matches a registered IAssetSerializer. This is a configuration/registration problem, not data corruption.","triggerScenarios":"Calling AssetFileSerializer.Load<T> with a stream and a filePath whose extension (lowercased) is not registered, e.g. '.txt', '.json', or a missing/renamed extension on the UFile path.","commonSituations":"Passing a temp/download file with wrong extension; opening a custom asset format without registering a serializer; typos in extension; trying to load non-asset files through the asset loader.","solutions":["Check the file path passed to Load has the correct asset extension (e.g. '.sdtex', '.sdscene')","Register a serializer for the extension via the serializer registration used by FindSerializer","Verify the file actually is a Stride asset and not a plain text/binary file","Log assetFileExtension right before Load to confirm what extension is being resolved"],"exampleFix":"// before\nvar result = AssetFileSerializer.Load<Texture>(stream, \"logo.png\");\n// after\nvar result = AssetFileSerializer.Load<Texture>(stream, \"logo.sdtex\");","handlingStrategy":"validation","validationCode":"var ext = Path.GetExtension(filePath).ToLowerInvariant();\nif (AssetFileSerializer.FindSerializer(ext) == null)\n    throw new InvalidOperationException($\"No serializer registered for '{ext}'\");","typeGuard":null,"tryCatchPattern":"try { AssetFileSerializer.Load<T>(stream, path, log); }\ncatch (InvalidOperationException ex) when (ex.Message.StartsWith(\"Unable to find a serializer\"))\n{ log.Error($\"Unsupported asset extension for {path}: {ex.Message}\"); }","preventionTips":["Only pass paths with registered Stride asset extensions","Register custom serializers before any load call","Sanitize downloaded/temp files' extensions before loading"],"tags":["serialization","assets","missing-serializer"],"backgroundTag":"resource-not-found","analyzedSha":"96fad776d210c221682aac1ccdf4c79dc046fc38","analyzedAt":"2026-09-14T02:59:31.279Z","contentChangedAt":"2026-09-14T02:59:31.279Z","schemaVersion":2},"datasetVersion":"2026-09-15T23:17:13.987Z"}