Strange error message in worker

Questions
1

Describe the problem/error/question

All my workflows seems to work well, but in worker logs I have strange error message like this

2025-07-10T12:20:57.134Z | debug | Running node "If is OK" started {"node":"If is OK","workflowId":"1","file":"logger-proxy.js","function":"exports.debug"}
2025-07-10T12:20:57.135Z | error | node execution output incorrect data
Error: node execution output incorrect data
    at WorkflowExecute.runNode (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@[email protected][email protected][email protected]_/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1220:6)
    at processTicksAndRejections (node:internal/process/task_queues:105:5)
    at /usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@[email protected][email protected][email protected]_/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1582:27
    at /usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@[email protected][email protected][email protected]_/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:2153:11
 {"file":"error-reporter.js","function":"defaultReport"}
2025-07-10T12:20:57.136Z | debug | Running node "If is OK" finished successfully {"node":"If is OK","workflowId":"1","file":"logger-proxy.js","function":"exports.debug"}

Like I said it did not impact the execution of my workflow but I don’t really understand where these errors messages come from and how to delete them

Information on your n8n setup

  • **n8n version:**1.102.0
  • **Database (default: SQLite):**Postgres
  • **n8n EXECUTIONS_PROCESS setting (default: own, main):**default
  • **Running n8n via (Docker, npm, n8n cloud, desktop app):**Docker
  • **Operating system:**Redhat
3 Likes
2

I have the same error in the logs on n8n 1.101.1 for the “Respond to Webhook” node, but despite the error, the node/flow works well.

2025-07-09T18:32:04.215Z | debug | Start executing node "Respond to Webhook" {"node":"Respond to Webhook","workflowId":"3YEYCDVZ9hHCsK5Q","file":"logger-proxy.js","function":"exports.debug"}
2025-07-09T18:32:04.217Z | debug | Running node "Respond to Webhook" started {"node":"Respond to Webhook","workflowId":"3YEYCDVZ9hHCsK5Q","file":"logger-proxy.js","function":"exports.debug"}
2025-07-09T18:32:04.220Z | error | node execution output incorrect data
Error: node execution output incorrect data
    at WorkflowExecute.runNode (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@[email protected][email protected][email protected][email protected]_/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1202:6)
    at /usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@[email protected][email protected][email protected][email protected]_/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1564:27
    at /usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@[email protected][email protected][email protected][email protected]_/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:2135:11
 {"file":"error-reporter.js","function":"defaultReport"}
2025-07-09T18:32:04.220Z | debug | Running node "Respond to Webhook" finished successfully {"node":"Respond to Webhook","workflowId":"3YEYCDVZ9hHCsK5Q","file":"logger-proxy.js","function":"exports.debug"}
2025-07-09T18:32:04.222Z | debug | Workflow execution finished successfully {"workflowId":"3YEYCDVZ9hHCsK5Q","file":"logger-proxy.js","function":"exports.debug"}
1 Like
3

We can follow the progress here: Error: node execution output incorrect data · Issue #17251 · n8n-io/n8n · GitHub

1 Like
4

Thank you for this info

5

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