Describe the problem/error/question
I can’t use the Parser output, I have a structure that has nothing to do with it.
What is the error message (if any)?
I have no error message
Please share your workflow
Share the output returned by the last node
[
{
“properties”: {
“foo”: {
“description”: “a list of test words”,
“type”: “array”,
“items”: {
“type”: “string”
}
}
},
“required”: [
“foo”
]
}
]
Information on your n8n setup
- n8n Beta LangChain
- Database (default: SQLite):
- **n8n EXECUTIONS_PROCESS main
- **Running n8n via docker compose , custom server
- Linux , ubuntu 22.04
Some additional information to explain my workflow. I would like to find the singer’s first and last names from their pseudonyms. It’s very difficult for some people to find them, so I used serpAPI and Wikipedia. I tried parsing on the former but it didn’t work. So I decided to create a basic LLM and put in structure name, first name, pseudo. I suppose it’s an example “json structure” that’s taken into account and not my own structure. I don’t know all the suptilities of Langchain. Any help would be appreciated.
Hi @simon_Piquemal 
I enlisted @oleg 's help here, but it looks like it’s an issue with your JSON. Instead of:
{
"nom": "string",
"prenom": "string"
}
Your root part needs to be a JSON object like this:
{
"type": "object",
"properties": {
"first_name": {
"type": "string"
},
"last_name": {
"type": "string"
}
}
}
Mind you that Oleg translated this to English, so don’t be too confused 
But here’s the workflow with this fixed up:
Sneaky edit: you can also probably just connect the Output parser directly, like this:
thank you i understand better the json structure system. Will there be a more in-depth doc and videos to explain Langchain in detail soon?
I think someone like @deborah would be the best person to ask about that, but I’d assume yes 
I have one last question, with this system it doesn’t work 100%, especially on the json structure. Why doesn’t the Auto-fixing Output Parser automatically re-execute several times to finally get the right structure?
