Memory Internal Error running AI Agent

[MM_MM]

Describe the problem/error/question

When i test module or test the workflow i get an internal error

What is the error message (if any)?

{
“errorMessage”: “Internal error”,
“errorDescription”: “Internal error”,
“errorDetails”: {},
“n8nDetails”: {
“time”: “27/07/2024, 11:31:38”,
“n8nVersion”: “1.51.1 (Self Hosted)”,
“binaryDataMode”: “default”,
“cause”: {}
}
}

Please share your workflow

Information on your n8n setup

• **n8n version: 1.51.1 (Self Hosted)
• Database (default: SQLite):
• n8n EXECUTIONS_PROCESS setting (default: own, main):
• Running n8n via (Docker, p):
• **Operating system:Ubuntu

[n8n]

It looks like your topic is missing some important information. Could you provide the following if applicable.

• n8n version:
• Database (default: SQLite):
• n8n EXECUTIONS_PROCESS setting (default: own, main):
• Running n8n via (Docker, npm, n8n cloud, desktop app):
• Operating system:

[MM_MM]

Debug info

core

• n8nVersion: 1.51.1
• platform: npm
• nodeJsVersion: 18.20.4
• database: sqlite
• executionMode: regular
• concurrency: -1
• license: community
• consumerId: unknown

storage

• success: all
• error: all
• progress: false
• manual: true
• binaryMode: memory

pruning

• enabled: true
• maxAge: 336 hours
• maxCount: 10000 executions

Generated at: 2024-07-27T11:02:05.297Z

[MM_MM]

NodeOperationError: Internal error at BufferWindowMemory.callMethodAsync (/root/.nvm/versions/node/v18.20.4/lib/node_modules/n8n/node_modules/@n8n/n8n-nodes-langchain/utils/logWrapper.ts:51:17) at processTicksAndRejections (node:internal/process/task_queues:95:5) at Proxy. (/root/.nvm/versions/node/v18.20.4/lib/node_modules/n8n/node_modules/@n8n/n8n-nodes-langchain/utils/logWrapper.ts:160:25) at AgentExecutor.invoke (/root/.nvm/versions/node/v18.20.4/lib/node_modules/n8n/node_modules/@n8n/n8n-nodes-langchain/node_modules/langchain/dist/chains/base.cjs:74:13) at Object.conversationalAgentExecute (/root/.nvm/versions/node/v18.20.4/lib/node_modules/n8n/node_modules/@n8n/n8n-nodes-langchain/nodes/agents/Agent/agents/ConversationalAgent/execute.ts:105:19) at Object.execute (/root/.nvm/versions/node/v18.20.4/lib/node_modules/n8n/node_modules/@n8n/n8n-nodes-langchain/nodes/agents/Agent/Agent.node.ts:378:11) at Workflow.runNode (/root/.nvm/versions/node/v18.20.4/lib/node_modules/n8n/node_modules/n8n-workflow/src/Workflow.ts:1382:8) at /root/.nvm/versions/node/v18.20.4/lib/node_modules/n8n/node_modules/n8n-core/src/WorkflowExecute.ts:1072:27 at /root/.nvm/versions/node/v18.20.4/lib/node_modules/n8n/node_modules/n8n-core/src/WorkflowExecute.ts:1775:11

[ria]

Hi @MM_MM

Thanks for posting here and welcome to the community!

I think it’s because you’re using an expression without having the expression mode turned on.

Could you give that a try?

[MM_MM]

Thanks, i had a blank value in a field being processed. Added an error trap and fixed it