{"record":{"id":"688cae8c62996ced","repo":"BabylonJS/Babylon.js","slug":"unexpected-end-of-file-missing-closing-brace","errorCode":null,"errorMessage":"Unexpected end of file: missing closing brace","messagePattern":"Unexpected end of file: missing closing brace","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/dev/loaders/src/BVH/bvhLoader.ts","lineNumber":314,"sourceCode":"        const numChannels = parseInt(tokens[1]);\n        // Skip CHANNELS and the number of channels\n        node.channels = tokens.splice(2, numChannels);\n        node.children = [];\n    }\n\n    // read children\n    while (lines.length > 0) {\n        const line = lines.shift()?.trim();\n\n        if (line === \"}\") {\n            // Finish reading the node\n            return node;\n        } else if (line) {\n            node.children.push(ReadNode(lines, line, node, context));\n        }\n    }\n\n    throw new Error(\"Unexpected end of file: missing closing brace\");\n}\n\n/**\n * Reads a BVH file, returns a skeleton\n * @param text - The BVH file content\n * @param scene - The scene to add the skeleton to\n * @param assetContainer - The asset container to add the skeleton to\n * @param loadingOptions - The loading options\n * @returns The skeleton\n */\nexport function ReadBvh(text: string, scene: Scene, assetContainer: Nullable<AssetContainer>, loadingOptions: BVHLoadingOptions): Skeleton {\n    const lines = text.split(\"\\n\");\n\n    const { loopMode } = loadingOptions;\n\n    scene._blockEntityCollection = !!assetContainer;\n    const skeleton = new Skeleton(\"\", \"\", scene);\n    skeleton._parentContainer = assetContainer;","sourceCodeStart":296,"sourceCodeEnd":332,"githubUrl":"https://github.com/BabylonJS/Babylon.js/blob/0592b347b8a4ee0236089ea86a749cacfdb266d8/packages/dev/loaders/src/BVH/bvhLoader.ts#L296-L332","documentation":"ReadNode consumes lines until it sees a closing \"}\" for the current node. If the input is exhausted before every opened brace is closed, the recursion cannot terminate cleanly and this error is thrown — the hierarchy section is unbalanced or truncated.","triggerScenarios":"A .bvh file with more \"{\" than \"}\": a JOINT block missing its final brace, or the entire HIERARCHY section cut off mid-tree before the MOTION keyword; nested joints whose inner braces are balanced but whose outermost ROOT brace is never closed.","commonSituations":"Files truncated during download or by line-count-limited preview tools; manual edits deleting a \"}\" line; concatenating a hierarchy with frame data incorrectly so the closing brace is lost; badly written BVH generators.","solutions":["Count braces: the number of \"{\" lines must equal the number of \"}\" lines in the HIERARCHY section — add the missing closing brace(s).","Check the file ends properly: after the hierarchy there should be a MOTION line followed by \"Frames: n\" and \"Frame Time:\" then frame data — a file ending mid-tree is truncated; re-download it.","If hand-editing, re-indent the hierarchy (each nesting level inside one more brace) to spot the unclosed block visually.","Validate the file with another BVH reader or the exporting tool before loading it here."],"exampleFix":"// before (missing outer brace)\nROOT Hips\n{\n  JOINT Spine\n  {\n    OFFSET 0 8 0\n  }\n// after\nROOT Hips\n{\n  JOINT Spine\n  {\n    OFFSET 0 8 0\n  }\n}","handlingStrategy":"validation","validationCode":"function assertBalancedBraces(text: string): void {\n  const hierarchy = text.toUpperCase().split(\"MOTION\")[0];\n  const opens = (hierarchy.match(/\\{/g) || []).length;\n  const closes = (hierarchy.match(/\\}/g) || []).length;\n  if (opens !== closes) {\n    throw new Error(`Unbalanced braces in HIERARCHY: ${opens} open vs ${closes} close.`);\n  }\n}","typeGuard":"function hasBalancedBvhHierarchy(text: string): boolean {\n  const h = text.toUpperCase().split(\"MOTION\")[0];\n  return (h.match(/\\{/g) || []).length === (h.match(/\\}/g) || []).length;\n}","tryCatchPattern":"try {\n  const skeleton = ReadBvh(text, scene, null, options);\n} catch (e) {\n  if (e instanceof Error && e.message.includes(\"missing closing brace\")) {\n    console.error(\"BVH hierarchy has an unclosed node block or is truncated.\");\n  } else { throw e; }\n}","preventionTips":["Count { and } equality before parsing.","Check the file ends with frame data, not mid-hierarchy.","Indent BVH hierarchies when editing so unclosed blocks are visible."],"tags":["bvh","parser","truncated-file","malformed-input"],"backgroundTag":"malformed-bvh-structure","analyzedSha":"0592b347b8a4ee0236089ea86a749cacfdb266d8","analyzedAt":"2026-08-30T15:11:20.442Z","schemaVersion":2},"datasetVersion":"2026-08-30T18:17:15.746Z"}