Component / transport / kexHandler session error: what to do

There are two main components of the Bitvise SSH package: Bitvise SSH Server and Bitvise SSH Client. The first can be used for remote control and administration of computers and servers, while the second is the Bitvise terminal emulator that offers dynamic port forwarding, command line and SFTP graphical support, and more.

However, some users have experienced problems with Bitvise SSH Client in newer versions of Windows. The most common scenario is that after a finished SSH2 session, a user would get the following error: Component / transport / kexHandler session error.

In this article, we will investigate how to solve this nasty problem.

Windows 1803 and Bitvise

Most of the users who reported persistent issues with Component Session / Transport / kexHandler error started experiencing the issue after Windows was upgraded to version 1803. This version of Windows was released in April 2021 , almost at the same time as version 8.31 of Bitvise SSH Client was introduced.

Many users have reported abruptly terminated SSH2 sessions, with the most common error message being mentioned. It is not known exactly what causes the error and why version 1803 of Windows 10 is particularly problematic. Fortunately, there are several things you can try before throwing your digital towel in the ring. Keep reading for possible solutions.

NOTE: Windows 10 and Bitvise Client have been updated several times since then. At the time of writing, the latest version of Windows 10 is 20H1 (February 2021), while Bitvise is at version 8.35 (August 20, 2021).

What to do?

In this section, we will investigate what you can do when the dreaded message “Component / transport / kexHandler session error” appears. Let’s dive into that.

Restart your computer

First, restart your PC or laptop. This simple solution is usually among the first to solve problems and tutorials related to Windows problems. The main reason behind this is that it allows your computer to clean up RAM and stop possible memory leaks caused by incorrectly closed programs.

However, in this case, it could also resolve some minor errors in communication between Bitvise SSH Client and Windows. Additionally, you can correct any Internet connection errors that may cause problems with remote access.

To safely restart your Windows 10 PC or laptop, do the following:

  1. Going to the desktop.
  2. Press the Alt + F4 buttons at the same time.
  3. When the Shut Down menu appears, click the drop-down menu.
  4. Select Restart.
  5. Click OK.

Run in Windows 7 compatibility mode

Some users have reported that running Bitvise SSH Client in Windows 7 compatibility mode helped them solve the problem. Follow these steps:

  1. Right-click the Bitvise SSH Client icon on the desktop.
  2. Select Properties
  3. Go to the Compatibility tab.
  4. Check the Run this program in compatibility mode for.
  5. Select Windows 7 from the drop-down menu.
  6. Click OK.

to Update Bitvise |

If none of the above solutions were effective, you should try to upgrade your Bitvise SSH Client. Here are the steps:

  1. Launch your favorite browser.
  2. Go to the download of Bitvise
  3. Click the Bitvise SSH Client Installer button. This should start the download automatically.
  4. Double-click the installer file and follow the on-screen instructions.

Don’t forget to restart your PC or laptop after installation.

Uninstall and reinstall Bitvise

Sometimes updating Bitvise SSH Client will not be enough. In this case, you may want to uninstall and then reinstall the program again. Here’s how it’s done:

  1. Click the Windows logo to start the Start menu.
  2. Type “Add or remove programs.”
  3. Click on the result above.
  4. The Applications and Features window will open. Locate the Bitvise SSH Client and click.
  5. Select the Uninstall option.
  6. Once the uninstall process is complete, double-click the installer file and follow the on-screen instructions to reinstall the program.

Reset your network

After restarting the computer, check to see if the problem persists. If so, you should try to re-establish your internet connection. Remember that this procedure will uninstall and reinstall all of your network adapters, as well as restore other network components to their original settings. You may also need to reinstall your network programs, including Bitvise SSH Client.

Here’s how to do it:

  1. Click the Windows logo in the lower left corner of the screen.
  2. Click the Settings icon.
  3. Click the Network and Internet section.
  4. When the Status window opens, scroll down and click the Reset Network link.
  5. In the next window, you will see the disclaimer on what a network reboot involves. Click the Reset Now button.

update windows

After restoring the network, you must reinstall and configure network programs and verify that you still receive the Error message in the Bitvise SSH client component session. If it does, it’s time to upgrade Windows to the latest version. Follow these steps:

  1. Click the Windows logo in the lower left corner of the screen.
  2. Click the Settings icon.
  3. The configuration window will open. Click Update and Security.
  4. Click the Check for Updates button.
  5. If Windows finds updates, click the Install button.

Unlimited SSH

Bitvise SSH Client can be stubborn at times, but the methods set out in this article should resolve even the most persistent issues with Component Session / Transport / kexHandler errors.

How long has Bitvise SSH Client and Server been used? How common are mistakes and how difficult is it to fix them? Let us know in the comments section.

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