LHC@home

Example : https://lhcathome.cern.ch/lhcathome/result.php?resultid=408773129

VBoxManage -q closemedium "E:\Boinc\data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.01_image.vdi" 
Output:
VBoxManage.exe: error: Cannot close medium 'E:\Boinc\data\projects\lhcathome.cern.ch_lhcathome\ATLAS_vbox_3.01_image.vdi' because it has 1 child media
VBoxManage.exe: error: Details: code VBOX_E_OBJECT_IN_USE (0x80bb000c), component MediumWrap, interface IMedium, callee IUnknown
VBoxManage.exe: error: Context: "Close()" at line 1875 of file VBoxManageDisk.cpp

2024-04-11 12:55:09 (31828): Could not create VM
2024-04-11 12:55:09 (31828): ERROR: VM failed to start
2024-04-11 12:55:09 (31828): Powering off VM.
2024-04-11 12:55:09 (31828): Deregistering VM. (boinc_9f59dc846623d426, slot#54)
2024-04-11 12:55:09 (31828): Removing network bandwidth throttle group from VM.
2024-04-11 12:55:09 (31828): Removing VM from VirtualBox.

I have checked Virtual box and no old tasks are listed, in fact there are no tasks listed at all.
I have also tried resetting the project so it redownloads the .vdi files with no joy.
Lastly I tried doing both together, uninstalling Virtual box, resetting the project, then reinstalling Virtualbox, same thing, I think I am doing something really dumb here but cant figure out what?

Do you have yellow triangle in Virtualbox-vboxmanager?

Not that I can see, this is what I see

VBoxManage.exe: error: Cannot close medium 'E:\Boinc\data\projects\lhcathome.cern.ch_lhcathome\ATLAS_vbox_3.01_image.vdi' because it has 1 child media
This is shown in Task.

Sorry where would I see that?

https://lhcathome.cern.ch/lhcathome/result.php?resultid=408782797 Example CMS that's failing with the same error, Theory now seems to work after a few reboots.

When you open Virtualbox program.
File -> Tool -> virtual media (STRG+D)

Ah thank you!, I see them in there with exclamation marks, ill delete them now and retry

atm it is important to control the .vdi in Virtualbox (manager).
Best would be to delete the old .vdi (excluding Theory)
to download a fresh .vdi (Atlas and CMS).