tool call end referenced unknown call {tool_call_id}

Error message

tool call end referenced unknown call {tool_call_id}

What it means

Error "tool call end referenced unknown call {tool_call_id}" thrown in openai/codex.

Source

Thrown at codex-rs/rollout-trace/src/reducer/tool.rs:200

        }
        Ok(())
    }

    /// Completes the canonical tool call and any terminal operation driven by dispatch output.
    ///
    /// Protocol-backed terminal tools end from runtime events; direct tools
    /// may only have the canonical result payload, so this method handles both paths.
    pub(super) fn end_tool_call(
        &mut self,
        seq: RawEventSeq,
        wall_time_unix_ms: i64,
        tool_call_id: ToolCallId,
        status: ExecutionStatus,
        result_payload: Option<RawPayloadRef>,
    ) -> Result<()> {
        let (terminal_operation_id, thread_id, end_terminal_from_result) = {
            let Some(tool_call) = self.rollout.tool_calls.get_mut(&tool_call_id) else {
                bail!("tool call end referenced unknown call {tool_call_id}");
            };
            tool_call.execution.ended_at_unix_ms = Some(wall_time_unix_ms);
            tool_call.execution.ended_seq = Some(seq);
            tool_call.execution.status = status.clone();
            tool_call.raw_result_payload_id = result_payload
                .as_ref()
                .map(|payload| payload.raw_payload_id.clone());
            (
                tool_call.terminal_operation_id.clone(),
                tool_call.thread_id.clone(),
                // Protocol-backed tools end terminal operations from
                // runtime observations. Dispatch result payloads are still kept
                // on ToolCall, but they are caller-facing and may be transformed
                // relative to the raw terminal output.
                tool_call.raw_runtime_payload_ids.is_empty(),
            )
        };
        if end_terminal_from_result && let Some(operation_id) = terminal_operation_id {

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/rollout-trace/src/reducer/tool.rs:200 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/5623a53189ea0c3e. Report an issue: GitHub.