Oracle virtual box inaccessible

Question

I am using Oracle Virtual Box version 4.2.16 r86992. Everything was fine until yesterday shutdown. Today, it shows inaccessible and throws this error:

Runtim         


        

Answer 1

Based on my experience, I was on Windows 7 and running Ubuntu 14.04 as guest OS on Virtual Machine.

1. Go to your Virtualbox folder (in my case): C:\Users\Dev12\VirtualBox VMs\Ubuntu
2. You'll see files with extensions: Ubuntu.vbox-tmp or Ubuntu.vbox-prev
3. Remove -tmp from file name Ubuntu.vbox-tmp so that it reads as Ubuntu.vbox
4. Exit from Virtual Machine and start it again.
5. You should now see error gone away.