Describe the problem/error/question
What is the error message (if any)?
Hello everyone! I’m having trouble configuring the retrieval of information after the initial setup process has gone correctly. The database appears to have been populated correctly, but when I try to ask a simple question in the chat, it returns this error. I’ve tried everything and can’t solve it!!
{
“name”: “RAG - VECTOR SUPABASE”,
“nodes”: [
{
“parameters”: {
“formTitle”: “Enviar arquivo para o RAG”,
“formDescription”: “={{ $now.setZone(‘America/Boa_Vista’).setLocale(‘pt-BR’).toFormat(“cccc, ‘dia’ dd-MM-yyyy HH:mm”) }}\nFaça aqui a inserção do arquivo homologado pela UTIC:”,
“formFields”: {
“values”: [
{
“fieldLabel”: “Arquivo”,
“fieldType”: “file”,
“requiredField”: true
}
]
},
“options”: {
“appendAttribution”: false
}
},
“type”: “n8n-nodes-base.formTrigger”,
“typeVersion”: 2.3,
“position”: [
256,
0
],
“id”: “58796141-db22-4ac1-8035-e7f9a09b647b”,
“name”: “On form submission”,
“webhookId”: “8d8adbb6-4636-45d9-9851-b9ecba348ece”
},
{
“parameters”: {
“mode”: “insert”,
“tableName”: {
“__rl”: true,
“value”: “documents”,
“mode”: “list”,
“cachedResultName”: “documents”
},
“embeddingBatchSize”: 2000,
“options”: {}
},
“type”: “@n8n/n8n-nodes-langchain.vectorStoreSupabase”,
“typeVersion”: 1.3,
“position”: [
528,
0
],
“id”: “bc0bb5f3-c941-453d-a575-05f19dc7c692”,
“name”: “Supabase Vector Store”,
“credentials”: {
“supabaseApi”: {
“id”: “liEA0IUwzFJ5cOeO”,
“name”: “supabaseCloudfy”
}
}
},
{
“parameters”: {
“dataType”: “binary”,
“options”: {
“metadata”: {
“metadataValues”: [
{
“name”: “file_id”
}
]
}
}
},
“type”: “@n8n/n8n-nodes-langchain.documentDefaultDataLoader”,
“typeVersion”: 1.1,
“position”: [
656,
176
],
“id”: “8d1f9c18-d341-447c-b4bc-9043be9d09ab”,
“name”: “Default Data Loader”
},
{
“parameters”: {
“content”: “### INDEX”,
“height”: 416,
“width”: 1024
},
“type”: “n8n-nodes-base.stickyNote”,
“position”: [
64,
-96
],
“typeVersion”: 1,
“id”: “21383bdc-30c5-4019-bb0b-cd4c3f84e1e0”,
“name”: “Sticky Note”
},
{
“parameters”: {
“options”: {}
},
“type”: “@n8n/n8n-nodes-langchain.chatTrigger”,
“typeVersion”: 1.4,
“position”: [
-16,
448
],
“id”: “65f24c53-74f2-4a19-8853-4abd9eb98678”,
“name”: “When chat message received”,
“webhookId”: “ed379c91-e347-4a2a-8464-9d2f745d0466”
},
{
“parameters”: {
“promptType”: “define”,
“text”: “={{ $json.texto }}”,
“options”: {}
},
“type”: “@n8n/n8n-nodes-langchain.agent”,
“typeVersion”: 3,
“position”: [
592,
448
],
“id”: “5220cbe8-e6cf-41f0-9cf3-54f309cf184c”,
“name”: “AI Agent”
},
{
“parameters”: {
“model”: {
“__rl”: true,
“value”: “gpt-4.1-mini”,
“mode”: “list”,
“cachedResultName”: “gpt-4.1-mini”
},
“builtInTools”: {},
“options”: {}
},
“type”: “@n8n/n8n-nodes-langchain.lmChatOpenAi”,
“typeVersion”: 1.3,
“position”: [
464,
656
],
“id”: “e4801ab9-70ab-476b-8c33-82892ca3885c”,
“name”: “OpenAI Chat Model”,
“credentials”: {
“openAiApi”: {
“id”: “Z78e6dClbFPjxsiJ”,
“name”: “OpenAi-PLUS”
}
}
},
{
“parameters”: {},
“type”: “@n8n/n8n-nodes-langchain.memoryBufferWindow”,
“typeVersion”: 1.3,
“position”: [
608,
656
],
“id”: “e4c859af-2dd9-42e5-8b27-67558b129a21”,
“name”: “Simple Memory”
},
{
“parameters”: {
“mode”: “retrieve-as-tool”,
“toolDescription”: “use essa tool para acessar informações.”,
“tableName”: {
“__rl”: true,
“value”: “documents”,
“mode”: “list”,
“cachedResultName”: “documents”
},
“options”: {}
},
“type”: “@n8n/n8n-nodes-langchain.vectorStoreSupabase”,
“typeVersion”: 1.3,
“position”: [
928,
592
],
“id”: “618ccc4f-7553-43b0-a437-a9657575af79”,
“name”: “Supabase Vector Store1”,
“credentials”: {
“supabaseApi”: {
“id”: “liEA0IUwzFJ5cOeO”,
“name”: “supabaseCloudfy”
}
}
},
{
“parameters”: {
“assignments”: {
“assignments”: [
{
“id”: “b65d3e89-01ad-4dc0-8165-e3c06219a5a4”,
“name”: “texto”,
“value”: “={{ $json.input || $json.chatInput || “” }}”,
“type”: “string”
}
]
},
“options”: {}
},
“type”: “n8n-nodes-base.set”,
“typeVersion”: 3.4,
“position”: [
288,
448
],
“id”: “3b743c1f-112b-41de-9d2c-5a20a59f4f1e”,
“name”: “Edit Fields”
},
{
“parameters”: {
“modelName”: “models/gemini-embedding-001”
},
“type”: “@n8n/n8n-nodes-langchain.embeddingsGoogleGemini”,
“typeVersion”: 1,
“position”: [
448,
176
],
“id”: “1e774049-6ed3-44c5-b192-7592671fe232”,
“name”: “Embeddings Google Gemini”,
“credentials”: {
“googlePalmApi”: {
“id”: “7pPh0dvRXdRtkkyS”,
“name”: “Google Gemini(PaLM) - PRO”
}
}
},
{
“parameters”: {
“modelName”: “models/gemini-embedding-001”
},
“type”: “@n8n/n8n-nodes-langchain.embeddingsGoogleGemini”,
“typeVersion”: 1,
“position”: [
1008,
800
],
“id”: “2e88bea9-d3e5-4e12-bb05-50087b169879”,
“name”: “Embeddings Google Gemini1”,
“credentials”: {
“googlePalmApi”: {
“id”: “7pPh0dvRXdRtkkyS”,
“name”: “Google Gemini(PaLM) - PRO”
}
}
}
],
“pinData”: {},
“connections”: {
“On form submission”: {
“main”: [
[
{
“node”: “Supabase Vector Store”,
“type”: “main”,
“index”: 0
}
]
]
},
“Default Data Loader”: {
“ai_document”: [
[
{
“node”: “Supabase Vector Store”,
“type”: “ai_document”,
“index”: 0
}
]
]
},
“When chat message received”: {
“main”: [
[
{
“node”: “Edit Fields”,
“type”: “main”,
“index”: 0
}
]
]
},
“OpenAI Chat Model”: {
“ai_languageModel”: [
[
{
“node”: “AI Agent”,
“type”: “ai_languageModel”,
“index”: 0
}
]
]
},
“Simple Memory”: {
“ai_memory”: [
[
{
“node”: “AI Agent”,
“type”: “ai_memory”,
“index”: 0
}
]
]
},
“Supabase Vector Store1”: {
“ai_tool”: [
[
{
“node”: “AI Agent”,
“type”: “ai_tool”,
“index”: 0
}
]
]
},
“Edit Fields”: {
“main”: [
[
{
“node”: “AI Agent”,
“type”: “main”,
“index”: 0
}
]
]
},
“Embeddings Google Gemini”: {
“ai_embedding”: [
[
{
“node”: “Supabase Vector Store”,
“type”: “ai_embedding”,
“index”: 0
}
]
]
},
“Embeddings Google Gemini1”: {
“ai_embedding”: [
[
{
“node”: “Supabase Vector Store1”,
“type”: “ai_embedding”,
“index”: 0
}
]
]
}
},
“active”: false,
“settings”: {
“executionOrder”: “v1”
},
“versionId”: “dcc096c5-811f-40d3-8243-0a616092f0d9”,
“meta”: {
“templateCredsSetupCompleted”: true,
“instanceId”: “9ac933ed51c741c45c1e0883c77ff4378b4f078faf3c97bbc14a22ff79117abb”
},
“id”: “0IzXYoESc1D8qr8D”,
“tags”:
}
Information about your n8n configuration
n8n version: 2.0.2
Database (default: SQLite): supabase
n8n EXECUTIONS_PROCESS configuration (default: own, main):
Running n8n via (Docker, npm, n8n cloud, desktop application): self host
