openclaw - 💡(How to fix) Fix [Bug]: Telegram voice messages fail with EPERM: operation not permitted, fsync on Windows [1 comments, 2 participants]

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openclaw/openclaw#77231Fetched 2026-05-05 05:50:56
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Telegram voice messages fail with EPERM: operation not permitted, fsync on Windows

Error Message

Log entry: module=telegram-auto-reply, error="Error: EPERM: operation not permitted,

Root Cause

Telegram voice messages fail with EPERM: operation not permitted, fsync on Windows

RAW_BUFFERClick to expand / collapse

Bug type

Regression (worked before, now fails)

Beta release blocker

No

Summary

Telegram voice messages fail with EPERM: operation not permitted, fsync on Windows

Steps to reproduce

  1. Run OpenClaw on Windows native (no WSL2) with Telegram channel configured
  2. Send a voice message (audio note) to the bot from Telegram
  3. Observe "Failed to download media. Please try again." in Telegram

Expected behavior

Voice message is downloaded, transcribed and processed normally by the agent

Actual behavior

Media fetch fails with: EPERM: operation not permitted, fsync Log entry: module=telegram-auto-reply, error="Error: EPERM: operation not permitted, fsync", message="media fetch failed", file=bot-Blf2Bm9e.js:2007, method=processInboundMessage

Text messages work fine. Only voice/audio attachments are affected. Reproduced on Node 25.9.0 and Node 22.15.0. Ruled out: Windows Defender, Controlled Folder Access (disabled), NTFS filesystem, folder permissions (full control via icacls).

OpenClaw version

2026.5.2

Operating system

Windows 10.0.26200.8246

Install method

npm install -g openclaw@latest

Model

qwen2.5:14b (via Ollama local)

Provider / routing chain

ollama (local) → http://localhost:11434

Additional provider/model setup details

Ollama running as Windows service, RTX 3090 24GB VRAM, inference 100% GPU. No cloud routing, no API keys, fully local setup.

Logs, screenshots, and evidence

Impact and severity

No response

Additional information

No response

extent analysis

TL;DR

The issue can be resolved by investigating and adjusting the file system permissions or handling of the fsync operation on Windows.

Guidance

  • Investigate the fsync operation in the bot-Blf2Bm9e.js file (line 2007) to understand how it interacts with the Windows file system.
  • Verify that the user running the OpenClaw process has the necessary permissions to perform file system operations, even though folder permissions have been ruled out.
  • Consider using a try-catch block to handle the EPERM error and provide a more informative error message or fallback behavior.
  • Review the differences in file system handling between text messages (which work fine) and voice/audio attachments to identify potential inconsistencies.

Example

No code example is provided due to the lack of specific implementation details in the issue.

Notes

The issue seems to be specific to Windows and the fsync operation, which may require platform-specific adjustments or workarounds. The fact that text messages work fine suggests that the issue is not related to the overall setup or configuration.

Recommendation

Apply a workaround, such as handling the EPERM error or adjusting file system permissions, as the root cause is likely related to the interaction between OpenClaw and the Windows file system.

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FAQ

Expected behavior

Voice message is downloaded, transcribed and processed normally by the agent

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openclaw - 💡(How to fix) Fix [Bug]: Telegram voice messages fail with EPERM: operation not permitted, fsync on Windows [1 comments, 2 participants]