Name Theory_2773-2997865-404_2
Workunit 229896122
Created 22 Jan 2025, 23:18:22 UTC
Sent 23 Jan 2025, 4:07:30 UTC
Report deadline 3 Feb 2025, 4:07:30 UTC
Received 23 Jan 2025, 5:10:01 UTC
Server state Over
Outcome Computation error
Client state Compute error
Exit status -2147467259 (0x80004005) Unknown error code
Computer ID 10646501
Run time 20 sec
CPU time
Validate state Invalid
Credit 0.00
Device peak FLOPS 3.57 GFLOPS
Application version Theory Simulation v300.60 (vbox64_theory)
windows_x86_64
Peak working set size 11.73 MB
Peak swap size 6.21 MB
Peak disk usage 0.87 MB

Stderr output

<core_client_version>7.16.11</core_client_version>
<![CDATA[
<message>
Erreur non sp�cifi�e
 (0x80004005) - exit code 2147500037 (0x80004005)</message>
<stderr_txt>
2025-01-23 05:08:59 (3720): vboxwrapper version 26208
2025-01-23 05:08:59 (3720): BOINC client version: 7.16.11
2025-01-23 05:09:00 (3720): Detected: VirtualBox VboxManage Interface (Version: 6.1.12)
2025-01-23 05:09:00 (3720): Detected: Heartbeat check (file: 'heartbeat' every 1200.000000 seconds)
2025-01-23 05:09:00 (3720): Successfully copied 'init_data.xml' to the shared directory.
2025-01-23 05:09:00 (3720): Successfully copied 'input' to the shared directory.
2025-01-23 05:09:00 (3720): Create VM. (boinc_05673b5070b12690, slot#4)
2025-01-23 05:09:01 (3720): Setting Memory Size for VM. (630MB)
2025-01-23 05:09:01 (3720): Setting CPU Count for VM. (1)
2025-01-23 05:09:02 (3720): Setting Chipset Options for VM.
2025-01-23 05:09:02 (3720): Setting Graphics Controller Options for VM.
2025-01-23 05:09:02 (3720): Setting Boot Options for VM.
2025-01-23 05:09:02 (3720): Setting Network Configuration for NAT.
2025-01-23 05:09:03 (3720): Enabling VM Network Access.
2025-01-23 05:09:03 (3720): Disabling USB Support for VM.
2025-01-23 05:09:03 (3720): Disabling COM Port Support for VM.
2025-01-23 05:09:03 (3720): Disabling LPT Port Support for VM.
2025-01-23 05:09:04 (3720): Disabling Audio Support for VM.
2025-01-23 05:09:04 (3720): Disabling Clipboard Support for VM.
2025-01-23 05:09:04 (3720): Disabling Drag and Drop Support for VM.
2025-01-23 05:09:05 (3720): Adding storage controller(s) to VM.
2025-01-23 05:09:05 (3720): Adding virtual disk drive to VM. (Theory_2025_01_16_prod.vdi)
2025-01-23 05:09:06 (3720): Adding VirtualBox Guest Additions to VM.
2025-01-23 05:09:06 (3720): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2025-01-23 05:09:06 (3720): forwarding host port 57881 to guest port 80
2025-01-23 05:09:07 (3720): Enabling remote desktop for VM.
2025-01-23 05:09:07 (3720): Required extension pack not installed, remote desktop not enabled.
2025-01-23 05:09:07 (3720): Enabling shared directory for VM.
2025-01-23 05:09:08 (3720): Starting VM using VBoxManage interface. (boinc_05673b5070b12690, slot#4)
2025-01-23 05:09:11 (3720): Error in start VM for VM: -2147467259
Command:
VBoxManage -q startvm "boinc_05673b5070b12690" --type headless
Output:
Waiting for VM "boinc_05673b5070b12690" to power on...
VBoxManage.exe: error: Not in a hypervisor partition (HVP=0) (VERR_NEM_NOT_AVAILABLE).
VBoxManage.exe: error: VT-x is disabled in the BIOS for all CPU modes (VERR_VMX_MSR_ALL_VMX_DISABLED)
VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component ConsoleWrap, interface IConsole

2025-01-23 05:09:11 (3720): VM failed to start.
2025-01-23 05:09:11 (3720): Could not start 
2025-01-23 05:09:11 (3720): ERROR: VM failed to start
2025-01-23 05:09:11 (3720): Powering off VM.
2025-01-23 05:09:11 (3720): Deregistering VM. (boinc_05673b5070b12690, slot#4)
2025-01-23 05:09:11 (3720): Removing network bandwidth throttle group from VM.
2025-01-23 05:09:11 (3720): Removing VM from VirtualBox.

    Hypervisor System Log:

00:00:01.287727          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:01.295998          Saving settings file "C:\Users\p1\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:01.572163          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:01.857502          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:02.133190          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:02.424805          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:02.695629          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:02.976967          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:03.247755          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:03.519158          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:03.776587          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:04.052323          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:04.333954          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:04.608369          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:04.871413          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:05.136307          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:05.407435          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:05.948815          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 0 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:05.949262          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 0 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:05.949475          Saving settings file "C:\Users\p1\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:05.957530          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:06.224805          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:06.504791          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 0 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:06.505445          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:06.511353          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 0 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:06.513162          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:06.518901          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:06.792013          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 1 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:06.793574          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 1 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:06.793774          Saving settings file "C:\Users\p1\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:06.802185          Saving settings file "C:\Users\p1\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:06.807478          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:07.067267          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:07.341075          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:07.892871          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:08.177412          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 2 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:08.177555          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 2 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:08.184706          ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0
00:00:08.431106          Launched VM: 76609696 pid: 3752 (0xea8) frontend: headless name: boinc_05673b5070b12690
00:00:11.645274          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox" with version "1.16-windows"
00:00:11.733952          ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0
00:00:12.055966          ERROR [COM]: aRC=VBOX_E_INVALID_OBJECT_STATE (0x80bb0007) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={MachineWrap} aText={Cannot unregister the machine 'boinc_05673b5070b12690' while it is locked}, preserve=false aResultDetail=0
00:00:13.335933          Saving settings file "C:\Users\p1\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:18.351470 main     VirtualBox: object deletion starts
00:00:18.352078 main     HostDnsMonitor: shutting down ...
00:00:18.352112 main     HostDnsMonitor: shut down
00:00:18.353173 Watcher  ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={d0a0163f-e254-4e5b-a1f2-011cf991c38d} aComponent={VirtualBoxWrap} aText={The object is not ready}, preserve=false aResultDetail=0
00:00:18.353354 main     VirtualBox: object deleted

    VM Execution Log:


    VM Startup Log:


    VM Trace Log:

ult Guest Additions ISO:     C:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso
Logging Level:                   all
Proxy Mode:                      System
Proxy URL:                       

2025-01-23 05:09:00 (3720): 
Command: VBoxManage -q list hostinfo 
Exit Code: 0
Output:
Host Information:

Host time: 2025-01-23T04:09:00.410000000Z
Processor online count: 4
Processor count: 4
Processor online core count: 2
Processor core count: 2
Processor supports HW virtualization: no
Processor supports PAE: yes
Processor supports long mode: yes
Processor supports nested paging: no
Processor supports unrestricted guest: no
Processor supports nested HW virtualization: no
Processor#0 speed: unknown
Processor#0 description: Intel(R) Core(TM) i3-6100T CPU @ 3.20GHz
Processor#1 speed: unknown
Processor#1 description: Intel(R) Core(TM) i3-6100T CPU @ 3.20GHz
Processor#2 speed: unknown
Processor#2 description: Intel(R) Core(TM) i3-6100T CPU @ 3.20GHz
Processor#3 speed: unknown
Processor#3 description: Intel(R) Core(TM) i3-6100T CPU @ 3.20GHz
Memory size: 8082 MByte
Memory available: 4823 MByte
Operating system: Windows 10
Operating system version: 10.0.19044

2025-01-23 05:09:00 (3720): 
Command: VBoxManage -q showvminfo "boinc_05673b5070b12690" --machinereadable 
Exit Code: -2135228415
Output:
VBoxManage.exe: error: Could not find a registered machine named 'boinc_05673b5070b12690'
VBoxManage.exe: error: Details: code VBOX_E_OBJECT_NOT_FOUND (0x80bb0001), component VirtualBoxWrap, interface IVirtualBox, callee IUnknown
VBoxManage.exe: error: Context: "FindMachine(Bstr(VMNameOrUuid).raw(), machine.asOutParam())" at line 2715 of file VBoxManageInfo.cpp

2025-01-23 05:09:01 (3720): 
Command: VBoxManage -q createvm --name "boinc_05673b5070b12690" --basefolder "C:\ProgramData\BOINC\slots\4" --ostype "Linux26_64" --register
Exit Code: 0
Output:
Virtual machine 'boinc_05673b5070b12690' is created and registered.
UUID: c7ee0671-a522-4899-a4af-f24c42f2b6f2
Settings file: 'C:\ProgramData\BOINC\slots\4\boinc_05673b5070b12690\boinc_05673b5070b12690.vbox'

2025-01-23 05:09:01 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --description "Theory_2773-2997865-404_2" 
Exit Code: 0
Output:

2025-01-23 05:09:01 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --memory 630 
Exit Code: 0
Output:

2025-01-23 05:09:02 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --cpus 1 
Exit Code: 0
Output:

2025-01-23 05:09:02 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --acpi on --ioapic on --rtcuseutc off 
Exit Code: 0
Output:

2025-01-23 05:09:02 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --vram 16 --graphicscontroller VBoxVGA 
Exit Code: 0
Output:

2025-01-23 05:09:02 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --boot1 disk --boot2 dvd --boot3 none --boot4 none 
Exit Code: 0
Output:

2025-01-23 05:09:03 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --nic1 nat --natdnsproxy1 on --cableconnected1 off 
Exit Code: 0
Output:

2025-01-23 05:09:03 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --cableconnected1 on 
Exit Code: 0
Output:

2025-01-23 05:09:03 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --usb off 
Exit Code: 0
Output:

2025-01-23 05:09:03 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --uart1 off --uart2 off 
Exit Code: 0
Output:

2025-01-23 05:09:04 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --lpt1 off --lpt2 off 
Exit Code: 0
Output:

2025-01-23 05:09:04 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --audio none 
Exit Code: 0
Output:

2025-01-23 05:09:04 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --clipboard disabled 
Exit Code: 0
Output:

2025-01-23 05:09:05 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --draganddrop disabled 
Exit Code: 0
Output:

2025-01-23 05:09:05 (3720): 
Command: VBoxManage -q storagectl "boinc_05673b5070b12690" --name "Hard Disk Controller" --add "sata" --controller "IntelAHCI" --hostiocache off --portcount 3
Exit Code: 0
Output:

2025-01-23 05:09:05 (3720): 
Command: VBoxManage -q showhdinfo "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_01_16_prod.vdi" 
Exit Code: 0
Output:
UUID:           6a4110e9-e559-4c1c-bfd2-ba6f6aaf4169
Parent UUID:    base
State:          created
Type:           normal (base)
Location:       C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2025_01_16_prod.vdi
Storage format: VDI
Format variant: dynamic default
Capacity:       20480 MBytes
Size on disk:   781 MBytes
Encryption:     disabled
Property:       AllocationBlockSize=1048576

2025-01-23 05:09:05 (3720): 
Command: VBoxManage -q storageattach "boinc_05673b5070b12690" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_01_16_prod.vdi" 
Exit Code: 0
Output:

2025-01-23 05:09:06 (3720): 
Command: VBoxManage -q storageattach "boinc_05673b5070b12690" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium none 
Exit Code: 0
Output:

2025-01-23 05:09:06 (3720): 
Command: VBoxManage -q storageattach "boinc_05673b5070b12690" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --mtype multiattach --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_01_16_prod.vdi" 
Exit Code: 0
Output:

2025-01-23 05:09:06 (3720): 
Command: VBoxManage -q storageattach "boinc_05673b5070b12690" --storagectl "Hard Disk Controller" --port 1 --device 0 --type dvddrive --medium "C:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso" 
Exit Code: 0
Output:

2025-01-23 05:09:06 (3720): 
Command: VBoxManage -q bandwidthctl "boinc_05673b5070b12690" add "boinc_05673b5070b12690_net" --type network --limit 1024G 
Exit Code: 0
Output:

2025-01-23 05:09:07 (3720): 
Command: VBoxManage -q modifyvm "boinc_05673b5070b12690" --natpf1 ",tcp,127.0.0.1,57881,,80" 
Exit Code: 0
Output:

2025-01-23 05:09:07 (3720): 
Command: VBoxManage -q list extpacks
Exit Code: 0
Output:
Extension Packs: 0

2025-01-23 05:09:07 (3720): 
Command: VBoxManage -q sharedfolder add "boinc_05673b5070b12690" --name "shared" --hostpath "C:\ProgramData\BOINC\slots\4/shared"
Exit Code: 0
Output:

2025-01-23 05:09:11 (3720): 
Command: VBoxManage -q startvm "boinc_05673b5070b12690" --type headless
Exit Code: -2147467259
Output:
Waiting for VM "boinc_05673b5070b12690" to power on...
VBoxManage.exe: error: Not in a hypervisor partition (HVP=0) (VERR_NEM_NOT_AVAILABLE).
VBoxManage.exe: error: VT-x is disabled in the BIOS for all CPU modes (VERR_VMX_MSR_ALL_VMX_DISABLED)
VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component ConsoleWrap, interface IConsole

2025-01-23 05:09:11 (3720): 
Command: VBoxManage -q snapshot "boinc_05673b5070b12690" list 
Exit Code: -108
Output:
This machine does not have any snapshots

2025-01-23 05:09:11 (3720): 
Command: VBoxManage -q bandwidthctl "boinc_05673b5070b12690" remove "boinc_05673b5070b12690_net" 
Exit Code: 0
Output:
VBoxManage.exe: error: Bandwidth groups cannot be deleted while the VM is running

2025-01-23 05:09:11 (3720): 
Command: VBoxManage -q unregistervm "boinc_05673b5070b12690" --delete 
Exit Code: -2135228409
Output:
VBoxManage.exe: error: Cannot unregister the machine 'boinc_05673b5070b12690' while it is locked
VBoxManage.exe: error: Details: code VBOX_E_INVALID_OBJECT_STATE (0x80bb0007), component MachineWrap, interface IMachine, callee IUnknown
VBoxManage.exe: error: Context: "Unregister(CleanupMode_DetachAllReturnHardDisksOnly, ComSafeArrayAsOutParam(aMedia))" at line 154 of file VBoxManageMisc.cpp

2025-01-23 05:09:13 (3720): 
Command: VBoxManage -q unregistervm "boinc_05673b5070b12690" --delete 
Exit Code: 0
Output:
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

2025-01-23 05:09:18 (3720): called boinc_finish(-2147467259)

</stderr_txt>
]]>


©2025 CERN