I am using VirtualBox 4.1.8 on Windows 7 64-bit. Yesterday I was happily working on a VM. Today the VirtualBox Manager said the VM was "inaccessible" and that it could not find the hard disk image. I checked the location where my VMs are stored and it was there.
So I removed the VM from the list and attempted to re-add the hard disk image. VirtualBox gave me this error:
Failed to open virtual machine located in D:/VM/Template Win7/Template Win7.vbox.
Trying to open a VM config 'D:/VM/Template Win7/Template Win7.vbox' which has the same UUID as an existing virtual machine.
Result Code: E_FAIL (0x80004005)
Component: Machine
Interface: IMachine {5eaa9319-62fc-4b0a-843c-0cb1940f8a91}
Callee: IVirtualBox {c28be65f-1a8f-43b4-81f1-eb60cb516e66}
There is no other VM with the same name anymore so I seem to be stuck.