LHC@home

Does anyone know what the VM failure is in the log for this work unit?
https://lhcathome.cern.ch/lhcathome/result.php?resultid=392169401

2023-04-24 10:34:15 (19704): Adding virtual disk drive to VM. (ATLAS_vbox_3.01_image.vdi)
2023-04-24 10:34:22 (19704): Error in deregister parent vdi for VM: -2135228404
Command:
VBoxManage -q closemedium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.01_image.vdi"
Output:
VBoxManage.exe: error: Cannot close medium 'C:\ProgramData\BOINC\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

2023-04-24 10:34:22 (19704): Could not create VM
2023-04-24 10:34:22 (19704): ERROR: VM failed to start
2023-04-24 10:34:22 (19704): Powering off VM.
2023-04-24 10:34:22 (19704): Deregistering VM. (boinc_59cce48668c5a14b, slot#0)
2023-04-24 10:34:23 (19704): Removing network bandwidth throttle group from VM.
2023-04-24 10:34:23 (19704): Removing VM from VirtualBox.

---

Regards,
Bob P.

Same error as described here:
https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=5982&postid=47976
Same solution, except that here (so far only!) the ATLAS vdi is affected.

Same error as described here:
https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=5982&postid=47976
Same solution, except that here (so far only!) the ATLAS vdi is affected.

This worked great, thank you!

For another Windows machine, I get this message in the BOINC log

4/25/2023 8:15:20 PM | LHC@home | Sending scheduler request: To fetch work.
4/25/2023 8:15:20 PM | LHC@home | Requesting new tasks for CPU
4/25/2023 8:15:21 PM | LHC@home | Scheduler request completed: got 0 new tasks
4/25/2023 8:15:21 PM | LHC@home | No tasks sent
4/25/2023 8:15:21 PM | LHC@home | No tasks are available for ATLAS Simulation

The project settings are for Atlas tasks, of which presently there are plenty. Weird.

---

Regards,
Bob P.

... another Windows machine ...

Which one?
Would be nice to have a link to it.

Based on the log snippet it is one of those:
https://lhcathome.cern.ch/lhcathome/show_host_detail.php?hostid=10787099
https://lhcathome.cern.ch/lhcathome/show_host_detail.php?hostid=10829158
https://lhcathome.cern.ch/lhcathome/show_host_detail.php?hostid=10819083

There are usually 2 main reasons:
1. You ask for vbox work but checked "Run native if available?" for the venue.
=> unlikely, since you run only Windows computers and all of them may be in the same venue.

2. Your computer details page(s) show(s) this: "...CPU does not have hardware virtualization support".
This and possible solutions have been described in Yeti's checklist and uncountable forum posts.