Stderr output

<core_client_version>7.24.1</core_client_version>
<![CDATA[
<message>
process exited with code 5 (0x5, -251)</message>
<stderr_txt>
2025-10-21 12:55:39 (651009): vboxwrapper version 26210
2025-10-21 12:55:39 (651009): BOINC client version: 7.24.1
2025-10-21 12:55:39 (651009): Detected: VirtualBox VboxManage Interface (Version: 7.0.16)
2025-10-21 12:55:39 (651009): Successfully copied 'init_data.xml' to the shared directory.
2025-10-21 12:55:39 (651009): Create VM. (boinc_e6c9d0455f5baa06, slot#2)
2025-10-21 12:55:39 (651009): Setting Memory Size for VM. (4600MB)
2025-10-21 12:55:39 (651009): Setting CPU Count for VM. (6)
2025-10-21 12:55:39 (651009): Setting Chipset Options for VM.
2025-10-21 12:55:39 (651009): Setting Graphics Controller Options for VM. (Driver: VBoxVGA, 16MB)
2025-10-21 12:55:39 (651009): Setting Boot Options for VM.
2025-10-21 12:55:39 (651009): Setting Network Configuration for NAT. (Driver: virtio)
2025-10-21 12:55:39 (651009): Enabling VM Network Access.
2025-10-21 12:55:39 (651009): Disabling USB Support for VM.
2025-10-21 12:55:40 (651009): Disabling COM Port Support for VM.
2025-10-21 12:55:40 (651009): Disabling LPT Port Support for VM.
2025-10-21 12:55:40 (651009): Disabling Audio Support for VM.
2025-10-21 12:55:40 (651009): Disabling Clipboard Support for VM.
2025-10-21 12:55:40 (651009): Disabling Drag and Drop Support for VM.
2025-10-21 12:55:40 (651009): Adding storage controller(s) to VM.
2025-10-21 12:55:40 (651009): Adding virtual disk drive to VM. (ATLAS_vbox_3.03_image.vdi)
2025-10-21 12:55:40 (651009): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2025-10-21 12:55:40 (651009): forwarding host port 34943 to guest port 80
2025-10-21 12:55:40 (651009): Enabling remote desktop for VM.
2025-10-21 12:55:41 (651009): Enabling shared directory for VM.
2025-10-21 12:55:41 (651009): Starting VM using VBoxManage interface. (boinc_e6c9d0455f5baa06, slot#2)
2025-10-21 12:55:41 (651009): Error in start VM for VM: -2147467259
Command:
VBoxManage -q startvm "boinc_e6c9d0455f5baa06" --type headless
Output:
VBoxManage: error: VirtualBox can't enable the AMD-V extension. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_SVM_IN_USE)
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component ConsoleWrap, interface IConsole
Waiting for VM "boinc_e6c9d0455f5baa06" to power on...

2025-10-21 12:55:41 (651009): VM failed to start.
2025-10-21 12:55:41 (651009): Could not start 
2025-10-21 12:55:41 (651009): ERROR: VM failed to start
2025-10-21 12:55:41 (651009): Powering off VM.
2025-10-21 12:55:41 (651009): Deregistering VM. (boinc_e6c9d0455f5baa06, slot#2)
2025-10-21 12:55:41 (651009): Removing network bandwidth throttle group from VM.
2025-10-21 12:55:41 (651009): Removing VM from VirtualBox.

    Hypervisor System Log:

00:00:01.552895 nspr-2   Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:01.556215 nspr-2   Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:01.608193 nspr-3   Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:01.611766 nspr-3   Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:01.661936 nspr-3   ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 0 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:01.662458 nspr-2   Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:01.665837 nspr-2   Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:01.665992 nspr-3   ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 0 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:01.666521 nspr-3   Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:01.669633 nspr-3   Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:01.669850 nspr-3   Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:01.673221 nspr-3   Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:01.720383 nspr-2   Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:01.724376 nspr-2   Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:01.776707 nspr-2   Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:01.780380 nspr-2   Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:01.885846 nspr-2   Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:01.892455 nspr-2   Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:01.943628 nspr-3   Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:01.947593 nspr-3   Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:02.001875 nspr-2   ERROR [COM]: aRC=VBOX_E_NOT_SUPPORTED (0x80bb0009) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={This VM is not encrypted}, preserve=false aResultDetail=0
00:00:02.016276 nspr-3   ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 1 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:02.016411 nspr-3   ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 1 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:02.016540 nspr-3   ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 2 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:02.016664 nspr-3   ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 2 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:02.023767 nspr-2   WARNING [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={e54f6256-97a7-4947-8a78-10c013ddf4b8} aComponent={HostWrap} aText={VirtualBox is not currently allowed to access USB devices.  You can change this by adding your user to the 'vboxusers' group.  Please see the user manual for a more detailed explanation}, preserve=true aResultDetail=0
00:00:02.023891 nspr-3   WARNING [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={e54f6256-97a7-4947-8a78-10c013ddf4b8} aComponent={HostWrap} aText={VirtualBox is not currently allowed to access USB devices.  You can change this by adding your user to the 'vboxusers' group.  Please see the user manual for a more detailed explanation}, preserve=true aResultDetail=0
00:00:02.026641 nspr-2   ERROR [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0
00:00:02.074675 nspr-2   Launched VM: 1342184560 pid: 651494 (0x9f0e6) frontend: headless name: boinc_e6c9d0455f5baa06
00:00:02.121094 nspr-4   WARNING [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={e54f6256-97a7-4947-8a78-10c013ddf4b8} aComponent={HostWrap} aText={VirtualBox is not currently allowed to access USB devices.  You can change this by adding your user to the 'vboxusers' group.  Please see the user manual for a more detailed explanation}, preserve=true aResultDetail=0
00:00:02.471727 nspr-4   Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:02.477915 nspr-4   Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:02.739412 nspr-3   ERROR [COM]: aRC=VBOX_E_VM_ERROR (0x80bb0003) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={Failed to get a console object from the direct session (NS_ERROR_ABORT)}, preserve=false aResultDetail=0
00:00:02.739474 main     Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:02.743154 main     Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:02.793543 Watcher  Reaper: Pid 651494 (0x9f0e6) was signalled: SIGSEGV (11 / 0xb)
00:00:02.794118 nspr-4   Saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox" with version "1.19-linux"
00:00:02.797413 nspr-4   Finished saving settings file "/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06.vbox"
00:00:02.848392 nspr-3   Saving settings file "/var/lib/boinc-client/projects/VirtualBox/VirtualBox.xml" with version "1.12-linux"
00:00:02.852476 nspr-3   Finished saving settings file "/var/lib/boinc-client/projects/VirtualBox/VirtualBox.xml"
00:00:02.852507 nspr-3   Saving settings file "/var/lib/boinc-client/projects/VirtualBox/VirtualBox.xml" with version "1.12-linux"
00:00:02.855771 nspr-3   Finished saving settings file "/var/lib/boinc-client/projects/VirtualBox/VirtualBox.xml"
00:00:02.856255 DeleteVM Saving settings file "/var/lib/boinc-client/projects/VirtualBox/VirtualBox.xml" with version "1.12-linux"
00:00:02.859884 DeleteVM Finished saving settings file "/var/lib/boinc-client/projects/VirtualBox/VirtualBox.xml"
00:00:07.861657 main     VirtualBox: object deletion starts
00:00:07.861894 main     HostDnsMonitor: shutting down ...
00:00:07.861984 main     HostDnsMonitor: shut down

    VM Execution Log:


    VM Startup Log:


    VM Trace Log:

lpt1="off"
lpt2="off"
audio="default"
audio_out="off"
audio_in="off"
clipboard="disabled"
draganddrop="disabled"
vrde="off"
usb="off"
ehci="off"
xhci="off"
recording_enabled="off"
recording_screens=1
 rec_screen0
rec_screen_enabled="on"
rec_screen_id=0
rec_screen_video_enabled="on"
rec_screen_dest="File"
rec_screen_dest_filename="/var/lib/boinc-client/slots/2/boinc_e6c9d0455f5baa06/boinc_e6c9d0455f5baa06-screen0.webm"
rec_screen_opts="vc_enabled=true,ac_enabled=false,ac_profile=med"
rec_screen_video_res_xy="1024x768"
rec_screen_video_rate_kbps=512
rec_screen_video_fps=25
description="TZZMDmMsEV8nsSi4ap6QjLDmwznN0nGgGQJmUXzaDm6E0NDmrKnCIn_2"
GuestMemoryBalloon=0

2025-10-21 12:55:39 (651009): 
Command: VBoxManage -q modifyvm "boinc_e6c9d0455f5baa06" --nic1 nat --nic-type1 "virtio" --cable-connected1 off --nat-dns-proxy1 on 
Exit Code: 0
Output:

2025-10-21 12:55:39 (651009): 
Command: VBoxManage -q modifyvm "boinc_e6c9d0455f5baa06" --cable-connected1 on 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q modifyvm "boinc_e6c9d0455f5baa06" --usb off 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q modifyvm "boinc_e6c9d0455f5baa06" --uart1 off --uart2 off 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q modifyvm "boinc_e6c9d0455f5baa06" --lpt1 off --lpt2 off 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q modifyvm "boinc_e6c9d0455f5baa06" --audio-enabled off 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q modifyvm "boinc_e6c9d0455f5baa06" --clipboard disabled 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q modifyvm "boinc_e6c9d0455f5baa06" --draganddrop disabled 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q storagectl "boinc_e6c9d0455f5baa06" --name "Hard Disk Controller" --add "sata" --controller "IntelAHCI" --hostiocache off --portcount 3
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q showhdinfo "/var/lib/boinc-client/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:
UUID:           3e56213b-898f-4e83-899f-8eb541d45260
Parent UUID:    base
State:          created
Type:           multiattach
Location:       /var/lib/boinc-client/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi
Storage format: VDI
Format variant: dynamic default
Capacity:       20480 MBytes
Size on disk:   4204 MBytes
Encryption:     disabled
Property:       AllocationBlockSize=1048576

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q storageattach "boinc_e6c9d0455f5baa06" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --mtype multiattach --medium "/var/lib/boinc-client/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: -2135228409
Output:
VBoxManage: error: Cannot attach medium '/var/lib/boinc-client/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi': the media type 'MultiAttach' can only be attached to machines that were created with VirtualBox 4.0 or later
VBoxManage: error: Details: code VBOX_E_INVALID_OBJECT_STATE (0x80bb0007), component SessionMachine, interface IMachine, callee nsISupports
VBoxManage: error: Context: "AttachDevice(Bstr(pszCtl).raw(), port, device, DeviceType_HardDisk, pMedium2Mount)" at line 781 of file VBoxManageStorageController.cpp

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q showhdinfo "/var/lib/boinc-client/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:
UUID:           3e56213b-898f-4e83-899f-8eb541d45260
Parent UUID:    base
State:          created
Type:           multiattach
Location:       /var/lib/boinc-client/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi
Storage format: VDI
Format variant: dynamic default
Capacity:       20480 MBytes
Size on disk:   4204 MBytes
Encryption:     disabled
Property:       AllocationBlockSize=1048576

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q closemedium disk "/var/lib/boinc-client/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q showhdinfo "/var/lib/boinc-client/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:
UUID:           3e56213b-898f-4e83-899f-8eb541d45260
Parent UUID:    base
State:          created
Type:           normal (base)
Location:       /var/lib/boinc-client/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi
Storage format: VDI
Format variant: dynamic default
Capacity:       20480 MBytes
Size on disk:   4204 MBytes
Encryption:     disabled
Property:       AllocationBlockSize=1048576

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q storageattach "boinc_e6c9d0455f5baa06" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium "/var/lib/boinc-client/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q storageattach "boinc_e6c9d0455f5baa06" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium none 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q storageattach "boinc_e6c9d0455f5baa06" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --mtype multiattach --medium "/var/lib/boinc-client/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q bandwidthctl "boinc_e6c9d0455f5baa06" add "boinc_e6c9d0455f5baa06_net" --type network --limit 1024G 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q modifyvm "boinc_e6c9d0455f5baa06" --natpf1 ",tcp,127.0.0.1,34943,,80" 
Exit Code: 0
Output:

2025-10-21 12:55:40 (651009): 
Command: VBoxManage -q list extpacks
Exit Code: 0
Output:
Extension Packs: 2
Pack no. 0:   VNC
Version:        7.0.16
Revision:       162802
Edition:        
Description:    VNC plugin module
VRDE Module:    VBoxVNC
Crypto Module:  
Usable:         true
Why unusable:   

Pack no. 1:   Oracle VM VirtualBox Extension Pack
Version:        7.0.16
Revision:       162802
Edition:        
Description:    Oracle Cloud Infrastructure integration, Host Webcam, VirtualBox RDP, PXE ROM, Disk Encryption, NVMe, full VM encryption.
VRDE Module:    VBoxVRDP
Crypto Module:  VBoxPuelCrypto
Usable:         true
Why unusable:   

2025-10-21 12:55:41 (651009): 
Command: VBoxManage -q modifyvm "boinc_e6c9d0455f5baa06" --vrde on --vrdeextpack default --vrdeauthlibrary default --vrdeauthtype null --vrdeport 43763 --vrde-property "Security/Method=RDP" 
Exit Code: 0
Output:

2025-10-21 12:55:41 (651009): 
Command: VBoxManage -q sharedfolder add "boinc_e6c9d0455f5baa06" --name "shared" --hostpath "/var/lib/boinc-client/slots/2/shared"
Exit Code: 0
Output:

2025-10-21 12:55:41 (651009): 
Command: VBoxManage -q startvm "boinc_e6c9d0455f5baa06" --type headless
Exit Code: -2147467259
Output:
VBoxManage: error: VirtualBox can't enable the AMD-V extension. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_SVM_IN_USE)
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component ConsoleWrap, interface IConsole
Waiting for VM "boinc_e6c9d0455f5baa06" to power on...

2025-10-21 12:55:41 (651009): 
Command: VBoxManage -q snapshot "boinc_e6c9d0455f5baa06" list 
Exit Code: -2135228413
Output:
VBoxManage: error: Failed to get a console object from the direct session (NS_ERROR_ABORT)
VBoxManage: error: Details: code VBOX_E_VM_ERROR (0x80bb0003), component MachineWrap, interface IMachine, callee nsISupports
VBoxManage: error: Context: "LockMachine(a->session, LockType_Shared)" at line 350 of file VBoxManageSnapshot.cpp

2025-10-21 12:55:41 (651009): 
Command: VBoxManage -q bandwidthctl "boinc_e6c9d0455f5baa06" remove "boinc_e6c9d0455f5baa06_net" 
Exit Code: 0
Output:

2025-10-21 12:55:41 (651009): 
Command: VBoxManage -q unregistervm "boinc_e6c9d0455f5baa06" --delete 
Exit Code: 0
Output:
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

2025-10-21 12:55:46 (651009): called boinc_finish(-2147467259)

</stderr_txt>
]]>

©2025 CERN