openai/codex · error · FunctionCallError

Fatal error: {0}

Error message

Fatal error: {0}

What it means

Error "Fatal error: {0}" thrown in openai/codex.

Source

Thrown at codex-rs/tools/src/function_call_error.rs:8

use thiserror::Error;

/// Error returned while executing a model-visible tool invocation.
#[derive(Debug, Error, PartialEq)]
pub enum FunctionCallError {
    #[error("{0}")]
    RespondToModel(String),
    #[error("Fatal error: {0}")]
    Fatal(String),
}

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/tools/src/function_call_error.rs:8 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of openai/codex@339751715c (2026-08-25). Data as JSON: /api/errors/c243c25a0bee6f6f. Report an issue: GitHub.