{"record":{"id":"083ba7945d3a769a","repo":"stride3d/stride","slug":"failed-to-get-indices-bufferdata-for-entity-chunk-entity","errorCode":null,"errorMessage":"Failed to get Indices BufferData for entity {chunk.Entity.Name}'s model.","messagePattern":"Failed to get Indices BufferData for entity (.+?)'s model\\.","errorType":"exception","errorClass":"Exception","httpStatus":null,"severity":"error","filePath":"sources/engine/Stride.Assets.Models/PrefabModelAssetCompiler.cs","lineNumber":185,"sourceCode":"                                .ToArray();\n\n                            mesh.VertexData.AddRange(vertexes);\n\n                            //indices\n                            var indexBufferRef = AttachedReferenceManager.GetAttachedReference(modelMesh.Draw.IndexBuffer.Buffer);\n                            byte[] indexData;\n                            if (indexBufferRef.Data != null)\n                            {\n                                indexData = ((BufferData)indexBufferRef.Data).Content;\n                            }\n                            else if (!string.IsNullOrEmpty(indexBufferRef.Url))\n                            {\n                                var dataAsset = manager.Load<Buffer>(indexBufferRef.Url);\n                                indexData = dataAsset.GetSerializationData().Content;\n                            }\n                            else\n                            {\n                                throw new Exception(\"Failed to get Indices BufferData for entity {chunk.Entity.Name}'s model.\");\n                            }\n\n                            var indexSize = modelMesh.Draw.IndexBuffer.Is32Bit ? sizeof(uint) : sizeof(ushort);\n\n                            byte[] indices;\n                            if (isScalingNegative)\n                            {\n                                // Get reversed winding order\n                                modelMesh.Draw.GetReversedWindingOrder(out indices);\n                                indices = indices.Skip(modelMesh.Draw.IndexBuffer.Offset)\n                                    .Take(modelMesh.Draw.IndexBuffer.Count*indexSize)\n                                    .ToArray();\n                            }\n                            else\n                            {\n                                // Get indices normally\n                                indices = indexData\n                                    .Skip(modelMesh.Draw.IndexBuffer.Offset)","sourceCodeStart":167,"sourceCodeEnd":203,"githubUrl":"https://github.com/stride3d/stride/blob/96fad776d210c221682aac1ccdf4c79dc046fc38/sources/engine/Stride.Assets.Models/PrefabModelAssetCompiler.cs#L167-L203","documentation":"Thrown by the prefab/model asset compiler when an index buffer reference cannot be resolved to loaded buffer data during mesh processing. Without the raw index data the compiler cannot reorder triangles for negative-scale transforms, so it aborts with this message.","triggerScenarios":"ProcessMaterial meets a mesh whose IndexBuffer reference URL is missing or whose manager.Load<Buffer>(indexBufferRef.Url) yields no serialized content.","commonSituations":"Same as vertex-buffer case: stale/corrupt imported model assets, version-mismatched intermediate assets, manually edited or merge-broken asset files. Also note this message's interpolation braces were left unescaped in the source (no $ prefix), so the entity name is printed literally.","solutions":["Re-import the model from its original source to regenerate index buffer data","Clean asset cache/output and rebuild","Verify the asset's index buffer references in Game Studio and repair broken links","Inspect the named entity's source model file for corruption"],"exampleFix":null,"handlingStrategy":"validation","validationCode":"if (string.IsNullOrEmpty(indexBufferRef?.Url))\n    throw new InvalidOperationException($\"Entity {chunk.Entity.Name} has no index buffer reference; re-import the model.\");","typeGuard":"static bool HasIndexData(Buffer ref buffer) => buffer?.GetSerializationData()?.Content is { Length: > 0 };","tryCatchPattern":"try\n{\n    ProcessMaterial(chunk);\n}\ncatch (Exception ex) when (ex.Message.Contains(\"Failed to get Indices BufferData\"))\n{\n    logger.Error($\"Re-import model for entity '{chunk.Entity.Name}': {ex.Message}\");\n}","preventionTips":["Re-import models after engine upgrades","Never manually edit compiled asset intermediates","Regenerate assets from original source files rather than patching","Clean caches when buffer references break after merges"],"tags":["assets","models","build-pipeline"],"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"}