400 Error when trying to use jsonlines file with OpenAI answers - openai-api

Question

I uploaded a file to openai for the purpose of answers. I can't figure out how to access it without getting an error.
This is the contents of my file:
{"text":"We are focusing on improving communication to the customers."}
{"text":"The emphasis on the customer is working well."}
{"text":"Services initiatives"}
{"text":"CMM and focus on customer service."}
{"text":"We are working on CMM to focus on the customer."}
{"text":"Our emphasis on making our customers number one."}
{"text":"Customer relationships are continuing to improve."}
This is the information about the file when I query openai:
{"object":"file","id":"file-02fdY5PuZ1aO4cnd2r1PxaB7","purpose":"answers","filename":"f3f1c105-5217-4132-8950-a040b6183ed7","bytes":458,"created_at":1648396701,"status":"processed","status_details":null}
Now I ask a question at https://api.openai.com/v1/answers with this POST:
{"file":"file-02fdY5PuZ1aO4cnd2r1PxaB7","question":"What is the main theme?","search_model": "davinci","model": "davinci","examples_context": "In 2017, U.S. life expectancy was 78.6 years.","examples": [["What is human life expectancy in the United States?","The life expectancy in the United States is 78 years."]],"max_tokens": 100,"stop": ["\n", "<|endoftext|>"]}
The server returns a 400 error. If in my request I replace the "file" field with a "documents" array using same data, the request is successful.
I don't know what more to look at. If someone can suggest something or if you seen an issue in what I am trying to do, I would deeply appreciate hearing from you.
Thanks