[Comments inline, below]

On 26 March 2013 07:13, Mark Filipak <markfilipak.virtual...@gmail.com> wrote:
> I'm stuck and I don't know how to get unstuck.
>
> In the 'Oracle VM VirtualBox Manager'
>
> Left Panel:
> The name of my VM is shown, and below it is a stop sign with a minus sign 
> plus the word "Inaccessible".
>
> Right Panel, Upper:
> "The selected virtual machine is inaccessible. Please inspect the error 
> message shown below and press the Refresh button if
> you want to repeat the accessibility check:"
>
> Right Panel, Lower:
> "Cannot attach medium 'C:\Program 
> Files\Oracle\VirtualBox\VBoxGuestAdditions.iso'
> {6af0f199-5a79-4a13-9679-f9421ed66ff9}: medium is already associated with the 
> current state of machine uuid
> {a8f8430c-4f3f-4584-a021-ad6e656b04e4}!.
> Result Code: VBOX_E_OBJECT_IN_USE (0x80BB000C)
> Component: Medium
> Interface: IMedium {29989373-b111-4654-8493-2e1176cba890}"


You may be able to repair the VM config file and remove this error.
In the VirtualBox Manager, right-click the VM and select 'Show in Explorer'.

You will see a file <VMNAME>.vbox, and probably also a <VMNAME>.vbox-prev file.

By carefully editing the <VMNAME>.vbox file to remove the reference to
VBoxGuestAdditions.iso, the error may be fixed.
Take a backup of the file first before editing it.
Comparing the ~.vbox file with the ~.vbox-prev file may indicate what
needs editing.
Does your VM have any snapshots?  If it does, that may make it harder
to decide what to edit.
Manually editing the config files could make things worse, so take
backups before.

The process is this:
- Close all instances of VirtualBox Manager and close all VMs and
check using TaskManager that no instances of VirtualBox.exe and
VBoxSvc.exe are running. Edits to VirtualBox config files will have no
effect while VirtualBox components are running.
(If after a minute some are still running, you will have to kill them.)

- Edit the ~.vbox file (Notepad.exe or whatever)
Look at the bottom for something like:
        <AttachedDevice passthrough="false" type="DVD" port="1" device="0">
          <Image uuid="{0a87233c-485f-4827-bcd5-e5f0ad6306b6}"/>
        </AttachedDevice>

- Replace that with:
        <AttachedDevice passthrough="false" type="DVD" port="1" device="0"/>
(Keep the same port and device as you had)

- See if that helps.

Another idea is to simply try copying the ~.vbox-prev file over the
~.vbox file (while no VirtualBox programs are running.

Good luck!

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