Error in AI Agent Node - Cannot read properties of undefined (reading 'map')

Questions
1

I have a flow that scrapes 10 websites and the feeds the result of the scrape into an AI agent node to create 10 personalise emails.

The agent runs and gets a result for run 1 but on run 2 it throws the error

Cannot read properties of undefined (reading ‘map’)

image
image1637×1095 232 KB

The agent is using the Anthropic model and a community node to clean the scraped website data.

Please share your workflow

{
  "errorMessage": "Cannot read properties of undefined (reading 'map')",
  "errorDetails": {},
  "n8nDetails": {
    "n8nVersion": "1.71.3 (Self Hosted)",
    "binaryDataMode": "default",
    "stackTrace": [
      "TypeError: Cannot read properties of undefined (reading 'map')",
      "    at _formatContent (/usr/local/lib/node_modules/n8n/node_modules/@langchain/anthropic/dist/utils/message_inputs.cjs:92:39)",
      "    at /usr/local/lib/node_modules/n8n/node_modules/@langchain/anthropic/dist/utils/message_inputs.cjs:216:26",
      "    at Array.map (<anonymous>)",
      "    at _convertMessagesToAnthropicPayload (/usr/local/lib/node_modules/n8n/node_modules/@langchain/anthropic/dist/utils/message_inputs.cjs:164:52)",
      "    at ChatAnthropic._generateNonStreaming (/usr/local/lib/node_modules/n8n/node_modules/@langchain/anthropic/dist/chat_models.cjs:714:75)",
      "    at ChatAnthropic._generate (/usr/local/lib/node_modules/n8n/node_modules/@langchain/anthropic/dist/chat_models.cjs:752:25)",
      "    at /usr/local/lib/node_modules/n8n/node_modules/@langchain/core/dist/language_models/chat_models.cjs:215:96",
      "    at Array.map (<anonymous>)",
      "    at ChatAnthropic._generateUncached (/usr/local/lib/node_modules/n8n/node_modules/@langchain/core/dist/language_models/chat_models.cjs:215:67)",
      "    at processTicksAndRejections (node:internal/process/task_queues:95:5)"
    ]
  }
}

Information on your n8n setup

  • n8n version: Latest
  • Database (default: SQLite): SQ Lite
  • n8n EXECUTIONS_PROCESS setting (fault: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app): Docker
  • Operating system: Ubuntu
2

Hi @Robm

Can you try to turn the toggle off for Require Specific Output Format? Because you’re not giving any instructions on the output format but it’s expecting it.