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I migrated my noteboook from Windows 10 to Ubuntu 18.04 recently. I wanted to keep my two virtual machines so I copied their Folders containing their .vbox .vbox-prev and .vdi files (Looking back I should have used the integrated export functionality). When I try to start the machines now on Ubuntu 18.04 Virtual Box aborts on start up with the following error message:

VD: error VERR_FILE_NOT_FOUND opening image file '/home/user/VirtualBox VMs/Ubuntu Mate 16.05/Ubuntu Mate 16.05.vdi' (VERR_FILE_NOT_FOUND).

Have I missed to copy something or is this related to the change of the operating system?

Is it possible to restore the virtual machines?

The vbox.log file:

00:00:01.798459 VirtualBox VM 6.0.0 r127566 linux.amd64 (Dec 18 2018 13:18:17) release log
00:00:01.798461 Log opened 2018-12-24T14:01:24.737853000Z
00:00:01.798462 Build Type: release
00:00:01.798464 OS Product: Linux
00:00:01.798465 OS Release: 4.15.0-43-generic
00:00:01.798465 OS Version: #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018
00:00:01.798480 DMI Product Name: 20H2S00700
00:00:01.798484 DMI Product Version: ThinkPad E470
00:00:01.798513 Host RAM: 15944MB (15.5GB) total, 13975MB (13.6GB) available
00:00:01.798515 Executable: /usr/lib/virtualbox/VirtualBoxVM
00:00:01.798516 Process ID: 8578
00:00:01.798516 Package type: LINUX_64BITS__UBUNTU_18_04
00:00:01.807559 Installed Extension Packs:
00:00:01.807572   Oracle VM VirtualBox Extension Pack (Version: 6.0.0 r127566; VRDE Module: VBoxVRDP)
00:00:01.808413 Console: Machine state changed to 'Starting'
00:00:01.808615 Qt version: 5.9.5
00:00:01.808625 X11 Window Manager code: 2
00:00:01.810852 Console: Machine state changed to 'PoweredOff'
00:00:01.814111 GUI: Show mini-toolbar for window #0
00:00:01.820202 Power up failed (vrc=VINF_SUCCESS, rc=NS_ERROR_FAILURE (0X80004005))
00:00:01.838190 GUI: Adjust mini-toolbar for window #0
00:00:01.838310 GUI:  Resize mini-toolbar for window #0 to 1920x1080
00:00:01.838358 GUI:  Move mini-toolbar for window #0 to 0x0
00:00:01.838998 X Server details: vendor: The X.Org Foundation, release: 11906000, protocol version: 11.0, display string: :0
00:00:01.839007 Using XKB for keycode to scan code conversion
00:00:02.321204 GUI: Aborting startup due to power up progress issue detected...
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    It does not appear you have put the VM in the correct location, /home/user/VirtualBox VMs/Ubuntu Mate 16.05/ – Ramhound Dec 24 '18 at 16:30
  • /home/user/VirtualBox VMs/ seems to be the standard now on my system for Virtual Box. The Folder /home/user/VirtualBox VMs/Ubuntu Mate 16.05/ contains the .vbox the .vbox-prev and .vdi file. Am I missing some file in this folder? – Noah Dec 24 '18 at 22:37
  • 1
    It works now. I renamed the files and removed all spaces in their names and now Virtual Box finds everything. Thanks @Ramhound – Noah Dec 24 '18 at 23:42
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  1. I removed the hard disk from VM setting and try to add it again but not worked.
  2. then I closed the VBox application and open it again it gives me a message that one of the hard drives did not exist when I looked to the virtual media manager it points to the same hard disk then I release the hard disk.
  3. and go to the VM settings and insert the hard disk again and worked.

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