Software⏱️ 3 min read📅 2026-06-11

How to Fix: How do I prevent a "No supported authentication methods available" error when using TortoiseHg?

TortoiseHg authentication error fix.

Quick Answer: Use a different SSH client, such as PuTTY or Pageant, to authenticate with the remote repository.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🔧 Proven Troubleshooting Steps
  3. ✨ Wrapping Up

The 'No supported authentication methods available' error occurs when TortoiseHg is unable to authenticate with the remote server using the specified SSH method.

This issue can be frustrating, especially for users who are new to Mercurial and Git-based version control systems. Fortunately, there are several steps you can take to resolve this problem and successfully interact with the remote repository.

🛑 Root Causes of the Error

  • The primary reason for this error is that TortoiseHg is not able to authenticate with the remote server using the specified SSH method. This could be due to a number of factors, including an incorrect username or password, a mismatch between the SSH method used on the local machine and the one used on the remote server.
  • Alternatively, it's possible that the remote server has changed its authentication methods, which would require updating the SSH method used in TortoiseHg.

🔧 Proven Troubleshooting Steps

Updating the SSH Method in TortoiseHg

  1. Step 1: Step 1: Open TortoiseHg and navigate to the repository you're trying to clone. Right-click on the repository and select 'TortoiseHg' > 'Settings'.
  2. Step 2: Step 2: In the settings window, click on the 'SSH' tab and update the 'Username' field with your actual username on the remote server.
  3. Step 3: Step 3: Update the 'Private Key File' field with the path to your private key file (if applicable). Click 'OK' to save the changes.
  4. Step 4: Step 4: Close TortoiseHg and try cloning the repository again. The updated SSH method should now be recognized by TortoiseHg.

Using PuTTYgen to Generate a New Private Key

  1. Step 1: Step 1: Download and install PuTTY from the official PuTTY website.
  2. Step 2: Step 2: Open PuTTYgen and generate a new private key file. Click 'Generate' and then save the generated private key file to a secure location.
  3. Step 3: Step 3: Update the 'Private Key File' field in TortoiseHg with the path to your newly generated private key file. Click 'OK' to save the changes.
  4. Step 4: Step 4: Close PuTTYgen and try cloning the repository again. The new private key should now be recognized by TortoiseHg.

✨ Wrapping Up

To summarize, the 'No supported authentication methods available' error in TortoiseHg can be resolved by updating the SSH method used in TortoiseHg or generating a new private key using PuTTYgen. By following these steps, you should be able to successfully interact with the remote repository and avoid this frustrating error.

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