Fix failed to open session for the virtual machine GNS3 VM

In this article, we will discuss how to Fix failed to open session for the virtual machine GNS3 VM. If you want to read more on the Windows system you can read these: How to prevent Windows Users from changing the Screen Saver via the Registry Settings. Here is how to Upgrade Windows 11 Pro to Enterprise and vice Versa, and how to install Windows 11 on HyperV, How to Install Windows Admin Center on Windows 10 & 11.

You will be prompted with the following error below. This happens when you wish to start a VM that the .vdi files have been deleted.

Also, see How to make a router function as a switch in GNS. See Graphical Network Simulator: How to uninstall GNS3 in Windows.

Resolution: failed to open session for the VM GNS3

Expanding “details,” more insight into the error will be described.

This error is self-explanatory. Therefore, I will proceed with my recommendations (solutions) below.

Restore the deleted .vdi files and attach them to the GNS3 VM. Delete the GNS3 VM from Oracle VirtualBox and delete all associated files, and have a new GNS3 VM recreated.

Here is Graphical Network Simulator: How to install GNS3 on macOS. Also, see “Graphical Network Simulator: How to install GNS3 on a Windows device.

I hope you found this blog post on how to “fix failed to open session for the virtual machine GNS3 VM” helpful. Please let me know in the comment session if you have any questions.