{"record":{"id":"9cfd6bb1167d8497","repo":"BabylonJS/Babylon.js","slug":"error-validating-interactivity-node-this-intera","errorCode":null,"errorMessage":"Error validating interactivity node ${this._interactivityGraph.declarations?.[node.declaration].op} - ${validationResult.error}","messagePattern":"Error validating interactivity node (.+?) - (.+?)","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/dev/loaders/src/glTF/2.0/Extensions/KHR_interactivity/interactivityGraphParser.ts","lineNumber":249,"sourceCode":"    private _parseNodes() {\n        if (!this._interactivityGraph.nodes) {\n            return;\n        }\n        for (const node of this._interactivityGraph.nodes) {\n            // some validation\n            if (typeof node.declaration !== \"number\") {\n                Logger.Error([\"No declaration found for node\", node]);\n                throw new Error(\"Error parsing nodes\");\n            }\n            const mapping = this._mappings[node.declaration];\n            if (!mapping) {\n                Logger.Error([\"No mapping found for node\", node]);\n                throw new Error(\"Error parsing nodes\");\n            }\n            if (mapping.flowGraphMapping.validation) {\n                const validationResult = mapping.flowGraphMapping.validation(node, this._interactivityGraph, this._gltf);\n                if (!validationResult.valid) {\n                    throw new Error(`Error validating interactivity node ${this._interactivityGraph.declarations?.[node.declaration].op} - ${validationResult.error}`);\n                }\n            }\n            const blocks: ISerializedFlowGraphBlock[] = [];\n            // create block(s) for this node using the mapping\n            for (const blockType of mapping.flowGraphMapping.blocks) {\n                const block = this._getEmptyBlock(blockType, mapping.fullOperationName);\n                this._parseNodeConfiguration(node, block, mapping.flowGraphMapping, blockType);\n                blocks.push(block);\n            }\n            this._nodes.push({ blocks, fullOperationName: mapping.fullOperationName });\n        }\n    }\n\n    private _getEmptyBlock(className: string, type: string): ISerializedFlowGraphBlock {\n        return {\n            uniqueId: RandomGUID(),\n            className,\n            dataInputs: [],","sourceCodeStart":231,"sourceCodeEnd":267,"githubUrl":"https://github.com/BabylonJS/Babylon.js/blob/0592b347b8a4ee0236089ea86a749cacfdb266d8/packages/dev/loaders/src/glTF/2.0/Extensions/KHR_interactivity/interactivityGraphParser.ts#L231-L267","documentation":"Thrown in _parseNodes when the mapped declaration's per-operation `validation` callback reports the node invalid. Unlike the generic parse errors, this message includes the declaration's op name and the validator's specific error string, pinpointing which interactivity operation failed its structural validation (inputs, configuration, or graph reference checks).","triggerScenarios":"A node passes declaration/mapping lookup but its mapped IGLTFToFlowGraphMapping.validation(node, graph, gltf) returns { valid: false, error } — e.g. wrong input count, missing required configuration, invalid socket references for that op.","commonSituations":"Assets using an operation with parameters outside its allowed ranges; nodes wired with incorrect configuration values that only the op-specific validator can detect; exporter bugs producing semantically invalid nodes.","solutions":["Read the op name and error detail in the message to see exactly which node/operation failed and why","Fix the offending node's configuration or input wiring in the asset per the reported error","Validate the asset with the glTF KHR_interactivity schema/validator before loading","Update Babylon.js in case the validator is stricter than the asset spec version requires"],"exampleFix":"// before: node for op \"math/add\" missing required configuration\n{ \"declaration\": 0 }\n// after: supply required inputs/configuration\n{ \"declaration\": 0, \"configuration\": { \"a\": { \"value\": [1] }, \"b\": { \"value\": [2] } } }","handlingStrategy":"try-catch","validationCode":"// Run the same validators the parser would run, before constructing the parser:\nfor (const node of graph.nodes ?? []) {\n  const mapping = getMappingForDeclaration(graph.declarations?.[node.declaration]);\n  const result = mapping?.validation?.(node, graph, gltf);\n  if (result && !result.valid) console.warn(`Node ${node.declaration} invalid: ${result.error}`);\n}","typeGuard":"null","tryCatchPattern":"try {\n  const parser = new InteractivityGraphToFlowGraphParser(graph, gltf);\n} catch (e) {\n  if (e.message.startsWith('Error validating interactivity node')) {\n    // message contains the op name and validator error — surface it to the artist\n    console.error('Invalid interactivity asset:', e.message);\n    return null; // or load without interactivity\n  }\n  throw e;\n}","preventionTips":["Parse the error message: it names the failing op and the validator's reason","Fix the flagged node's configuration/inputs in the authoring tool, not by hand","Add op-level validation to your export pipeline using the mapper's validation callbacks","Keep exporter and Babylon.js versions aligned to avoid spec drift"],"tags":["gltf","khr-interactivity","validation","nodes"],"backgroundTag":"node-validation-failed","analyzedSha":"0592b347b8a4ee0236089ea86a749cacfdb266d8","analyzedAt":"2026-08-30T15:11:20.442Z","schemaVersion":2},"datasetVersion":"2026-08-30T18:17:15.746Z"}