HKUDS/nanobot · error · RuntimeError

DingTalk attachment fallback was not delivered

Error message

DingTalk attachment fallback was not delivered

What it means

Error "DingTalk attachment fallback was not delivered" thrown in HKUDS/nanobot.

Source

Thrown at nanobot/channels/dingtalk/runtime.py:789

            )
            if msg.chat_id.startswith("group:") and safe_sender_name:
                content = f"# @{safe_sender_name}\n\n{content}"
            if not await self._send_markdown_text(token, msg.chat_id, content):
                raise RuntimeError("DingTalk text message was not delivered")

        for media_ref in msg.media or []:
            ok = await self._send_media_ref(token, msg.chat_id, media_ref)
            if ok:
                continue
            self.logger.error("media send failed for {}", media_ref)
            # Send visible fallback so failures are observable by the user.
            filename = self._guess_filename(media_ref, self._guess_upload_type(media_ref))
            if not await self._send_markdown_text(
                token,
                msg.chat_id,
                f"[Attachment send failed: {filename}]",
            ):
                raise RuntimeError("DingTalk attachment fallback was not delivered")

    async def _on_message(
        self,
        content: str,
        sender_id: str | None,
        sender_name: str,
        conversation_type: str | None = None,
        conversation_id: str | None = None,
    ) -> None:
        """Handle incoming message (called by NanobotDingTalkHandler).

        Delegates to BaseChannel._handle_message() which enforces allow_from
        permission checks before publishing to the bus.
        """
        try:
            self.logger.info("inbound: {} from {}", content, sender_name)
            if not sender_id:
                self.logger.warning("dropping DingTalk message without a sender ID")

View on GitHub (pinned to 42f37dc4c0)

When it happens

Trigger: Thrown at nanobot/channels/dingtalk/runtime.py:789 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of HKUDS/nanobot@42f37dc4c0 (2026-08-26). Data as JSON: /api/errors/e411df414f731122. Report an issue: GitHub.