{"record":{"id":"e7084d489f86d035","repo":"BabylonJS/Babylon.js","slug":"unable-to-load-the-snippet-snippetid","errorCode":null,"errorMessage":"Unable to load the snippet ${snippetId}","messagePattern":"Unable to load the snippet (.+?)","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/dev/core/src/FlowGraph/flowGraphParser.ts","lineNumber":23,"sourceCode":"import { type FlowGraphBlock, type IFlowGraphBlockParseOptions } from \"./flowGraphBlock\";\nimport { type FlowGraphContext, type IFlowGraphContextParseOptions } from \"./flowGraphContext\";\nimport { type IFlowGraphCoordinatorParseOptions, FlowGraphCoordinator } from \"./flowGraphCoordinator\";\nimport { type FlowGraphDataConnection } from \"./flowGraphDataConnection\";\nimport { FlowGraphEventBlock } from \"./flowGraphEventBlock\";\nimport { FlowGraphExecutionBlock } from \"./flowGraphExecutionBlock\";\nimport { type FlowGraphSignalConnection } from \"./flowGraphSignalConnection\";\nimport { defaultValueParseFunction, needsPathConverter } from \"./serialization\";\nimport { type ISerializedFlowGraph, type ISerializedFlowGraphBlock, type ISerializedFlowGraphContext } from \"./typeDefinitions\";\nimport { type Node } from \"core/node\";\nimport { getRichTypeByFlowGraphType, RichType } from \"./flowGraphRichTypes.pure\";\nimport { type FlowGraphConnection } from \"./flowGraphConnection\";\nimport { Constants } from \"core/Engines/constants\";\nimport { WebRequest } from \"core/Misc/webRequest\";\n\nasync function GetSerializedFlowGraphFromSnippetAsync(snippetId: string): Promise<any> {\n    const response = await WebRequest.FetchAsync(Constants.SnippetUrl + \"/\" + snippetId.replace(/#/g, \"/\"));\n    if (!response.ok) {\n        throw new Error(\"Unable to load the snippet \" + snippetId);\n    }\n\n    const text = new TextDecoder().decode(await response.arrayBuffer());\n    const snippet = JSON.parse(text);\n    const snippetPayload = JSON.parse(snippet.jsonPayload);\n    const flowGraphPayload = snippetPayload.flowGraph;\n    if (!flowGraphPayload) {\n        throw new Error(\"Snippet \" + snippetId + \" does not contain a flow graph\");\n    }\n\n    return typeof flowGraphPayload === \"string\" ? JSON.parse(flowGraphPayload) : flowGraphPayload;\n}\n\nfunction ApplyCoordinatorSerializationSettings(serializedObject: any, coordinator: FlowGraphCoordinator): void {\n    if (serializedObject.dispatchEventsSynchronously !== undefined) {\n        coordinator.dispatchEventsSynchronously = serializedObject.dispatchEventsSynchronously;\n    }\n","sourceCodeStart":5,"sourceCodeEnd":41,"githubUrl":"https://github.com/BabylonJS/Babylon.js/blob/0592b347b8a4ee0236089ea86a749cacfdb266d8/packages/dev/core/src/FlowGraph/flowGraphParser.ts#L5-L41","documentation":"Thrown by GetSerializedFlowGraphFromSnippetAsync when the HTTP request to the Babylon.js snippet server (Constants.SnippetUrl + id) returns a non-ok response. The snippet with the given id could not be retrieved, so no flow graph can be parsed.","triggerScenarios":"Calling FlowGraphParser.ParseFlowGraphAsync (via GetSerializedFlowGraphFromSnippetAsync) with a snippetId that does not exist on the snippet server, or when the server is unreachable/returns an error status.","commonSituations":"Typo in the snippet id or URL; snippet deleted or expired; offline/blocked network or corporate proxy; snippet server outage; passing a snippet id from a different snippet service.","solutions":["Verify the snippet id is correct and the snippet still exists by opening it in the snippet viewer","Check network connectivity/proxy settings and retry when the server is reachable","Confirm Constants.SnippetUrl points at the correct snippet server","Keep a local copy of the serialized flow graph as a fallback"],"exampleFix":"// before\nconst graph = await FlowGraphParser.ParseFlowGraphAsync('bad#id');\n// after (use the id from the snippet URL you saved)\nconst graph = await FlowGraphParser.ParseFlowGraphAsync('ABCDEF#123456');","handlingStrategy":"retry","validationCode":"// Pre-flight: HEAD-check the snippet before parsing\nconst res = await fetch(`${SNIPPET_URL}/${snippetId.replace(/#/g, '/')}`, { method: 'HEAD' });\nif (!res.ok) throw new Error(`Snippet ${snippetId} unavailable (HTTP ${res.status})`);","typeGuard":null,"tryCatchPattern":"try {\n  const graph = await FlowGraphParser.ParseFlowGraphAsync(snippetId);\n} catch (e) {\n  if (String(e.message).startsWith('Unable to load the snippet')) {\n    // retry with backoff, or fall back to a local serialized copy\n  }\n}","preventionTips":["Verify snippet ids by opening them in the snippet viewer","Keep local backups of important serialized flow graphs","Handle offline/blocked network conditions in host apps"],"tags":["network","babylonjs","snippets","http-error"],"backgroundTag":"http-request-failed","analyzedSha":"0592b347b8a4ee0236089ea86a749cacfdb266d8","analyzedAt":"2026-08-30T15:11:20.442Z","schemaVersion":2},"datasetVersion":"2026-08-30T18:17:15.746Z"}