openai/codex · error · Error

Codex config override at ${path} cannot be null

Error message

Codex config override at ${path} cannot be null

What it means

Error "Codex config override at ${path} cannot be null" thrown in openai/codex.

Source

Thrown at sdk/typescript/src/exec.ts:333

  } else if (typeof value === "boolean") {
    return value ? "true" : "false";
  } else if (Array.isArray(value)) {
    const rendered = value.map((item, index) => toTomlValue(item, `${path}[${index}]`));
    return `[${rendered.join(", ")}]`;
  } else if (isPlainObject(value)) {
    const parts: string[] = [];
    for (const [key, child] of Object.entries(value)) {
      if (!key) {
        throw new Error("Codex config override keys must be non-empty strings");
      }
      if (child === undefined) {
        continue;
      }
      parts.push(`${formatTomlKey(key)} = ${toTomlValue(child, `${path}.${key}`)}`);
    }
    return `{${parts.join(", ")}}`;
  } else if (value === null) {
    throw new Error(`Codex config override at ${path} cannot be null`);
  } else {
    const typeName = typeof value;
    throw new Error(`Unsupported Codex config override value at ${path}: ${typeName}`);
  }
}

const TOML_BARE_KEY = /^[A-Za-z0-9_-]+$/;
function formatTomlKey(key: string): string {
  return TOML_BARE_KEY.test(key) ? key : JSON.stringify(key);
}

function isPlainObject(value: unknown): value is CodexConfigObject {
  return typeof value === "object" && value !== null && !Array.isArray(value);
}

function findCodexPath(): CodexPathResolution {
  const { platform, arch } = process;

View on GitHub (pinned to 339751715c)

Solutions

1. Remove the null override at the given path or replace it with a concrete value.

When it happens

Trigger: Thrown at sdk/typescript/src/exec.ts:333 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/3ecc2db4b367b6e3. Report an issue: GitHub.