I don't know Sometimes Mine code Works Perfectly & some time the Same code is giving me Error I have tried to install the pervious version of all the packages but i didn't work:

from dotenv import load_dotenv
from livekit import agents
from livekit.agents import AgentSession, Agent, RoomInputOptions
from livekit.plugins import elevenlabs,google,deepgram,noise_cancellation,silero
from livekit.plugins.turn_detector.multilingual import MultilingualModel
from Config import saveQualifiedLead,disqualifyLead,CallbackTime
from Prompts import SYSTEM_PROMPT
load_dotenv()


class Assistant(Agent):
    def __init__(self) -> None:
        super().__init__(instructions=SYSTEM_PROMPT,
                        stt=deepgram.STT(model="nova-2-phonecall"),
                        llm=google.LLM(model="gemini-2.5-flash-preview-05-20"),
                        tts=elevenlabs.TTS(model="eleven_turbo_v2_5",voice_id="UgBBYS2sOqTuMpoF3BR0"),
                        vad=silero.VAD.load(),
                        turn_detection=MultilingualModel(),
                        tools=[saveQualifiedLead,disqualifyLead,CallbackTime]
                        )


async def entrypoint(ctx: agents.JobContext):
    
    
    session = AgentSession(allow_interruptions=False)

    await session.start(
        room=ctx.room,
        agent=Assistant(),
        room_input_options=RoomInputOptions(
            audio_enabled=True,
            video_enabled=False,
            noise_cancellation=noise_cancellation.BVC(), 
        ),
    )
    
    await session.generate_reply( instructions="Simply Say 'Hello!! How are you Doing!!' ")

    


if __name__ == "__main__":
    agents.cli.run_app(agents.WorkerOptions(entrypoint_fnc=entrypoint,agent_name="Umer"))

❌ Error:

2025-08-03 20:39:17,262 - INFO livekit.agents - initializing process {"pid": 3276, "inference": true}
2025-08-03 20:39:20,104 - DEBUG livekit.agents - initializing inference runner {"runner": "lk_end_of_utterance_multilingual", "pid": 3276, "inference": true}
2025-08-03 20:39:27,270 - INFO livekit.agents - killing process {"pid": 3276, "inference": true}
2025-08-03 20:39:27,270 - ERROR livekit.agents - worker failed 
Traceback (most recent call last):
  File "C:\Python313\Lib\asyncio\tasks.py", line 507, in wait_for
    return await fut
           ^^^^^^^^^
  File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\ipc\channel.py", line 47, in arecv_message
    return _read_message(await dplx.recv_bytes(), messages)
                         ^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\utils\aio\duplex_unix.py", line 35, in recv_bytes
    len_bytes = await self._reader.readexactly(4)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Python313\Lib\asyncio\streams.py", line 769, in readexactly
    await self._wait_for_data('readexactly')
  File "C:\Python313\Lib\asyncio\streams.py", line 539, in _wait_for_data
    await self._waiter
asyncio.exceptions.CancelledError

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\cli\_run.py", line 79, in _worker_run
    await worker.run()
  File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\worker.py", line 387, in run
    await self._inference_executor.initialize()
  File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\ipc\supervised_proc.py", line 169, in initialize
    init_res = await asyncio.wait_for(
               ^^^^^^^^^^^^^^^^^^^^^^^
    ...<2 lines>...
    )
    ^
  File "C:\Python313\Lib\asyncio\tasks.py", line 506, in wait_for
    async with timeouts.timeout(timeout):
               ~~~~~~~~~~~~~~~~^^^^^^^^^
  File "C:\Python313\Lib\asyncio\timeouts.py", line 116, in __aexit__
    raise TimeoutError from exc_val
TimeoutError
2025-08-03 20:39:27,277 - ERROR livekit.agents - Error in _read_ipc_task 
Traceback (most recent call last):
  File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\utils\aio\duplex_unix.py", line 35, in recv_bytes
    len_bytes = await self._reader.readexactly(4)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Python313\Lib\asyncio\streams.py", line 767, in readexactly
    raise exceptions.IncompleteReadError(incomplete, n)
asyncio.exceptions.IncompleteReadError: 0 bytes read on a total of 4 expected bytes

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\utils\log.py", line 16, in async_fn_logs
    return await fn(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\cli\watcher.py", line 120, in _read_ipc_task
    msg = await channel.arecv_message(self._pch, proto.IPC_MESSAGES)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\ipc\channel.py", line 47, in arecv_message
    return _read_message(await dplx.recv_bytes(), messages)
                         ^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\utils\aio\duplex_unix.py", line 43, in recv_bytes
    raise DuplexClosed() from e
livekit.agents.utils.aio.duplex_unix.DuplexClosed

Thanks for reaching out, Zaid. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.

2025-08-03 203927,270 - ERROR livekit.agents - worker failed Traceback (most recent call last): File "C:\Python313\Lib\asyncio\tasks.py", line 507, in wait_for return await fut ^^^^^^^^^ File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\ipc\channel.py", line 47, in arecv_message return _read_message(await dplx.recv_bytes(), messages) ^^^^^^^^^^^^^^^^^^^^^^^ File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\utils\aio\duplex_unix.py", line 35, in recv_bytes len_bytes = await self._reader.readexactly(4) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python313\Lib\asyncio\streams.py", line 769, in readexactly await self._wait_for_data('readexactly') File "C:\Python313\Lib\asyncio\streams.py", line 539, in _wait_for_data await self._waiter asyncio.exceptions.CancelledError The above exception was the direct cause of the following exception: Traceback (most recent call last): File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\cli\_run.py", line 79, in _worker_run await worker.run() File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\worker.py", line 387, in run await self._inference_executor.initialize() File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\ipc\supervised_proc.py", line 169, in initialize init_res = await asyncio.wait_for( ^^^^^^^^^^^^^^^^^^^^^^^ ...<2 lines>... ) ^ File "C:\Python313\Lib\asyncio\tasks.py", line 506, in wait_for async with timeouts.timeout(timeout): ~~~~~~~~~~~~~~~~^^^^^^^^^ File "C:\Python313\Lib\asyncio\timeouts.py", line 116, in aexit raise TimeoutError from exc_val TimeoutError 2025-08-03 203927,277 - ERROR livekit.agents - Error in _read_ipc_task Traceback (most recent call last): File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\utils\aio\duplex_unix.py", line 35, in recv_bytes len_bytes = await self._reader.readexactly(4) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Python313\Lib\asyncio\streams.py", line 767, in readexactly raise exceptions.IncompleteReadError(incomplete, n) asyncio.exceptions.IncompleteReadError: 0 bytes read on a total of 4 expected bytes The above exception was the direct cause of the following exception: Traceback (most recent call last): File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\utils\log.py", line 16, in async_fn_logs return await fn(*args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\cli\watcher.py", line 120, in _read_ipc_task msg = await channel.arecv_message(self._pch, proto.IPC_MESSAGES) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\ipc\channel.py", line 47, in arecv_message return _read_message(await dplx.recv_bytes(), messages) ^^^^^^^^^^^^^^^^^^^^^^^ File "D:\livekit-Agent-development\.venv\Lib\site-packages\livekit\agents\utils\aio\duplex_unix.py", line 43, in recv_bytes raise DuplexClosed() from e livekit.agents.utils.aio.duplex_unix.DuplexClosed

Hey there! The error

livekit.agents.utils.aio.duplex_unix.DuplexClosed

pops up when a duplex connection closes unexpectedly or just stops working. This might happen because of network hiccups, a process crashing, or even if the connection was closed on purpose. Here’s how you can tackle this: • Wrap your duplex operations (like

send_bytes

,

recv_bytes

,

aclose

) inside

try-except

blocks to catch that

DuplexClosed

exception. • Log the error so you know what’s going on, and then decide what to do next — maybe reconnect or stop further actions. • Think about adding some retry logic or reinitializing the connection if you can bounce back from this. Here’s a quick example:

try:
    await duplex.send_bytes(data)
except DuplexClosed:
    print("Oops! Duplex connection closed unexpectedly. Shutting down.")
    await duplex.aclose()
    # You can also try reconnecting or handle the closure as needed

Also, it’s a good idea to clean up resources properly, keep an eye on connection health, and use logging to track what’s happening with the connection. If you want, I’m here to help you out with anything else!