{"record":{"id":"74f7813b1b0d4f36","repo":"BabylonJS/Babylon.js","slug":"context-target-path-could-not-find-interpolati","errorCode":null,"errorMessage":"${context}/target/path: Could not find interpolation properties for target path (${channel.target.path})","messagePattern":"(.+?)/target/path: Could not find interpolation properties for target path \\((.+?)\\)","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/dev/loaders/src/glTF/2.0/glTFLoader.pure.ts","lineNumber":1893,"sourceCode":"                case AnimationChannelTargetPath.ROTATION: {\r\n                    properties = GetMappingForKey(\"/nodes/{}/rotation\")?.interpolation!;\r\n                    break;\r\n                }\r\n                case AnimationChannelTargetPath.SCALE: {\r\n                    properties = GetMappingForKey(\"/nodes/{}/scale\")?.interpolation!;\r\n                    break;\r\n                }\r\n                case AnimationChannelTargetPath.WEIGHTS: {\r\n                    properties = GetMappingForKey(\"/nodes/{}/weights\")?.interpolation!;\r\n                    break;\r\n                }\r\n                default: {\r\n                    throw new Error(`${context}/target/path: Invalid value (${channel.target.path})`);\r\n                }\r\n            }\r\n            // stay safe\r\n            if (!properties) {\r\n                throw new Error(`${context}/target/path: Could not find interpolation properties for target path (${channel.target.path})`);\r\n            }\r\n\r\n            const targetInfo: IObjectInfo<IInterpolationPropertyInfo[]> = {\r\n                object: targetNode,\r\n                info: properties,\r\n            };\r\n\r\n            return this._loadAnimationChannelFromTargetInfoAsync(context, animationContext, animation, channel, targetInfo, onLoad);\r\n        });\r\n    }\r\n\r\n    /**\r\n     * @hidden\r\n     * Loads a glTF animation channel.\r\n     * @param context The context when loading the asset\r\n     * @param animationContext The context of the animation when loading the asset\r\n     * @param animation The glTF animation property\r\n     * @param channel The glTF animation channel property\r","sourceCodeStart":1875,"sourceCodeEnd":1911,"githubUrl":"https://github.com/BabylonJS/Babylon.js/blob/0592b347b8a4ee0236089ea86a749cacfdb266d8/packages/dev/loaders/src/glTF/2.0/glTFLoader.pure.ts#L1875-L1911","documentation":"After the target-path switch resolves interpolation property mappings, a null result indicates that although the path itself was valid, no matching node/morph mapping could be built (e.g. the target node lacks the animated property, such as WEIGHTS on a node without morph targets). This is a defensive \"stay safe\" check before using the properties.","triggerScenarios":"An animation channel targets path \"weights\" on a mesh/node that has no morph targets, or a node lookup produced no mapping entry for a nominally valid path.","commonSituations":"Retargeting animations between meshes with/without morph targets, exporters that emit WEIGHTS channels unconditionally, or nodes pruned during optimization while their animation channels remain.","solutions":["Ensure the target node's mesh defines morph targets if the path is \"weights\".","Strip animation channels that target nodes missing the corresponding property.","Re-export the asset so animation channels match the node/mesh structure.","Validate the asset with glTF-Validator to detect dangling animation targets."],"exampleFix":"// before: weights channel targeting a mesh without morph targets\n// after: either add morph targets to the mesh or remove the channel\n\"channels\": [] // removed weights channel for node without morph targets","handlingStrategy":"validation","validationCode":"for (const ch of gltf.animations?.flatMap(a => a.channels) ?? []) {\n  if (ch.target.path === \"weights\") {\n    const node = gltf.nodes?.[ch.target.node!];\n    const mesh = gltf.meshes?.[node?.mesh!];\n    if (!mesh?.primitives.some(p => p.targets)) {\n      throw new Error(`weights channel targets node ${ch.target.node} without morph targets`);\n    }\n  }\n}","typeGuard":"function hasMorphTargets(gltf: any, nodeIndex: number): boolean {\n  const meshIndex = gltf.nodes?.[nodeIndex]?.mesh;\n  return !!gltf.meshes?.[meshIndex]?.primitives?.some((p: any) => Array.isArray(p.targets));\n}","tryCatchPattern":"try { await loadAsset(); } catch (e) {\n  if (/Could not find interpolation properties/.test((e as Error).message)) {\n    // retry loading with animations stripped or fix morph targets\n  }\n}","preventionTips":["Only retarget WEIGHTS channels to meshes that actually have morph targets.","Strip orphaned animation channels when optimizing assets.","Validate retargeted animations with glTF-Validator."],"tags":["gltf","animation","morph-targets","asset-loading"],"backgroundTag":"missing-animation-target","analyzedSha":"0592b347b8a4ee0236089ea86a749cacfdb266d8","analyzedAt":"2026-08-30T15:11:20.442Z","schemaVersion":2},"datasetVersion":"2026-08-30T18:17:15.746Z"}