# `AI_NoObjectGeneratedError: No object generated: could not parse or validate the response against schema.`

**Where it appears:** Terminal or Vercel runtime logs

**What it means:** Your app asked the AI model for structured data matching a schema, and the model's answer was cut off mid-sentence or didn't match the required fields.

## Likely causes

- `max_completion_tokens` was set too low, so the JSON output was truncated before the closing bracket.
- The output schema has overly complex nested rules without clear field descriptions, or the error wasn't handled as a friendly retry.

## Message for your agent

```text
Structured AI output failed with `AI_NoObjectGeneratedError`. Check that `max_completion_tokens` is ~2x the longest expected answer, simplify the schema descriptions, and return a friendly message if validation fails.
```

**Prevention:** Set `max_completion_tokens` to ~2× the longest expected answer and always validate and escape model output before using it.

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Source: [Agentic Makers](https://agenticmakers.app/en/help/errors/ai-no-object-generated-json-parse-failed) · License: CC BY 4.0