Task 11060233

Name 08398758_18_0
Workunit 8581596
Created 11 Jul 2021, 19:33:32 UTC
Sent 12 Jul 2021, 11:48:28 UTC
Report deadline 17 Jul 2021, 11:48:28 UTC
Received 16 Jul 2021, 7:12:58 UTC
Server state Over
Outcome Computation error
Client state Compute error
Exit status -2147467259 (0x80004005) Unknown error code
Computer ID 11928
Run time 24 sec
CPU time
Validate state Invalid
Credit 0.00
Device peak FLOPS 2.57 GFLOPS
Application version boinc2docker v1.14 (vbox64_mt)
windows_x86_64
Peak working set size 8.72 MB
Peak swap size 10.00 MB
Peak disk usage 273.78 MB

Stderr output

<core_client_version>7.16.11</core_client_version>
<![CDATA[
<message>
Unspecified error
 (0x80004005) - exit code 2147500037 (0x80004005)</message>
<stderr_txt>
2021-07-12 13:03:06 (12428): Detected: vboxwrapper 26202
2021-07-12 13:03:06 (12428): Detected: BOINC client v7.16.11
2021-07-12 13:03:08 (12428): Detected: VirtualBox VboxManage Interface (Version: 6.1.12)
2021-07-12 13:03:09 (12428): Create VM. (boinc_6b054d96a0b9f61d, slot#0)
2021-07-12 13:03:09 (12428): Updating drive controller type and model for desired configuration.
2021-07-12 13:03:12 (12428): Setting Memory Size for VM. (3072MB)
2021-07-12 13:03:13 (12428): Setting CPU Count for VM. (1)
2021-07-12 13:03:15 (12428): Setting Chipset Options for VM.
2021-07-12 13:03:15 (12428): Setting Boot Options for VM.
2021-07-12 13:03:15 (12428): Setting Network Configuration for NAT.
2021-07-12 13:03:16 (12428): Enabling VM Network Access.
2021-07-12 13:03:16 (12428): Disabling USB Support for VM.
2021-07-12 13:03:16 (12428): Disabling COM Port Support for VM.
2021-07-12 13:03:16 (12428): Disabling LPT Port Support for VM.
2021-07-12 13:03:17 (12428): Disabling Audio Support for VM.
2021-07-12 13:03:17 (12428): Disabling Clipboard Support for VM.
2021-07-12 13:03:17 (12428): Disabling Drag and Drop Support for VM.
2021-07-12 13:03:17 (12428): Adding storage controller(s) to VM.
2021-07-12 13:03:18 (12428): Adding virtual ISO 9660 disk drive to VM. (vm_isocontext.iso)
2021-07-12 13:03:18 (12428): Adding VirtualBox Guest Additions to VM.
2021-07-12 13:03:18 (12428): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2021-07-12 13:03:19 (12428): Enabling shared directory for VM.
2021-07-12 13:03:19 (12428): Starting VM using VBoxManage interface. (boinc_6b054d96a0b9f61d, slot#0)
2021-07-12 13:03:22 (12428): Error in start VM for VM: -2147467259
Command:
VBoxManage -q startvm "boinc_6b054d96a0b9f61d" --type headless
Output:
Waiting for VM "boinc_6b054d96a0b9f61d" to power on...
VBoxManage.exe: error: The native API dll was not found (C:\WINDOWS\system32\WinHvPlatform.dll) (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

2021-07-12 13:03:22 (12428): VM failed to start.
2021-07-12 13:03:22 (12428): Could not start 
2021-07-12 13:03:22 (12428): ERROR: VM failed to start
2021-07-12 13:03:22 (12428): Powering off VM.
2021-07-12 13:03:22 (12428): Deregistering VM. (boinc_6b054d96a0b9f61d, slot#0)
2021-07-12 13:03:22 (12428): Removing network bandwidth throttle group from VM.
2021-07-12 13:03:22 (12428): Removing VM from VirtualBox.
2021-07-12 13:03:23 (12428): Removing virtual ISO 9660 disk from VirtualBox.

    Hypervisor System Log:

00:00:01.510832          usbLibGetDevices: Found 4 USB devices, 0 captured
00:00:01.510908          USB: Unknown USB device detected (idVendor: 0x05c8, idProduct: 0x035d)
00:00:01.552817          HostDnsMonitor: initializing
00:00:01.559603          HostDnsMonitor: updating information
00:00:01.559637          HostDnsMonitor: old information
00:00:01.559638            no server entries
00:00:01.559640            no domain set
00:00:01.559640            no search string entries
00:00:01.559640          HostDnsMonitor: new information
00:00:01.559641            server 1: 10.0.48.5
00:00:01.559642            server 2: 10.0.48.6
00:00:01.559643            server 3: 8.8.8.8
00:00:01.559643            server 4: 4.2.2.2
00:00:01.559644            domain: CHQ.NNPCGroup.local
00:00:01.559644            no search string entries
00:00:01.605178          SUPR0QueryVTCaps -> VERR_VMX_MSR_ALL_VMX_DISABLED
00:00:01.605585          VD: VDInit finished with VINF_SUCCESS
00:00:01.606482          VirtualBox: object created
00:00:02.017513          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={d0a0163f-e254-4e5b-a1f2-011cf991c38d} aComponent={VirtualBoxWrap} aText={Could not find a registered machine named 'boinc_6b054d96a0b9f61d'}, preserve=false aResultDetail=0
00:00:02.279559          ERROR [COM]: aRC=VBOX_E_FILE_ERROR (0x80bb0004) aIID={ad47ad09-787b-44ab-b343-a082a3f2dfb1} aComponent={MediumWrap} aText={Could not find file for the medium 'C:\ProgramData\BOINC\slots\0\vm_image.vdi' (VERR_FILE_NOT_FOUND)}, preserve=false aResultDetail=-102
00:00:02.729314          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:03.550045          Saving settings file "C:\Users\RCS017\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:04.385784          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:05.652339          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:06.669193          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:07.935662          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:08.458113          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:08.726638          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:08.988843          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:09.260100          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:09.523642          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:09.788519          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:10.055788          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:10.322709          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:10.585098          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:10.851812          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:11.116850          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
00:00:11.118025          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
00:00:11.118159          Saving settings file "C:\Users\RCS017\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:11.149140          Saving settings file "C:\Users\RCS017\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:11.231281          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:11.632962          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
00:00:11.634040          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
00:00:11.634174          Saving settings file "C:\Users\RCS017\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:11.684722          Saving settings file "C:\Users\RCS017\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:11.767496          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:11.897645          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:12.162910          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:12.430131          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
00:00:12.430240          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
00:00:12.435716          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
00:00:12.679867          Launched VM: 69300544 pid: 8296 (0x2068) frontend: headless name: boinc_6b054d96a0b9f61d
00:00:15.256422          Saving settings file "C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox" with version "1.16-windows"
00:00:15.468509          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
00:00:15.780462          Saving settings file "C:\Users\RCS017\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:21.050923 main     VirtualBox: object deletion starts
00:00:21.051486 main     HostDnsMonitor: shutting down ...
00:00:21.051585 main     HostDnsMonitor: shut down
00:00:21.053731 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
00:00:21.053954 main     VirtualBox: object deleted

    VM Execution Log:


    VM Startup Log:


    VM Trace Log:

mum Devices per SATA Port:   1
Maximum PIIX3 SCSI Controllers:  1
Maximum ICH9 SCSI Controllers:   8
Maximum SCSI Port count:         16
Maximum Devices per SCSI Port:   1
Maximum SAS PIIX3 Controllers:   1
Maximum SAS ICH9 Controllers:    8
Maximum SAS Port count:          255
Maximum Devices per SAS Port:    1
Maximum NVMe PIIX3 Controllers:  1
Maximum NVMe ICH9 Controllers:   8
Maximum NVMe Port count:         255
Maximum Devices per NVMe Port:   1
Maximum virtio-scsi PIIX3 Controllers:  1
Maximum virtio-scsi ICH9 Controllers:   8
Maximum virtio-scsi Port count:         256
Maximum Devices per virtio-scsi Port:   1
Maximum PIIX3 Floppy Controllers:1
Maximum ICH9 Floppy Controllers: 1
Maximum Floppy Port count:       1
Maximum Devices per Floppy Port: 2
Default machine folder:          C:\Users\RCS017\VirtualBox VMs
Raw-mode Supported:              no
Exclusive HW virtualization use: off
Default hard disk format:        VDI
VRDE auth library:               VBoxAuth
Webservice auth. library:        VBoxAuth
Remote desktop ExtPack:          
Log history count:               3
Default frontend:                
Default audio driver:            DirectSound
Autostart database path:         
Default Guest Additions ISO:     C:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso
Logging Level:                   all
Proxy Mode:                      System
Proxy URL:                       

2021-07-12 13:03:09 (12428): 
Command: VBoxManage -q list hostinfo 
Exit Code: 0
Output:
Host Information:

Host time: 2021-07-12T12:03:08.855000000Z
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) i5-4200U CPU @ 1.60GHz
Processor#1 speed: unknown
Processor#1 description: Intel(R) Core(TM) i5-4200U CPU @ 1.60GHz
Processor#2 speed: unknown
Processor#2 description: Intel(R) Core(TM) i5-4200U CPU @ 1.60GHz
Processor#3 speed: unknown
Processor#3 description: Intel(R) Core(TM) i5-4200U CPU @ 1.60GHz
Memory size: 3993 MByte
Memory available: 1502 MByte
Operating system: Windows 10
Operating system version: 10.0.10240

2021-07-12 13:03:09 (12428): 
Command: VBoxManage -q showvminfo "boinc_6b054d96a0b9f61d" --machinereadable 
Exit Code: -2135228415
Output:
VBoxManage.exe: error: Could not find a registered machine named 'boinc_6b054d96a0b9f61d'
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

2021-07-12 13:03:09 (12428): 
Command: VBoxManage -q showhdinfo "C:\ProgramData\BOINC\slots\0/vm_image.vdi" 
Exit Code: -2135228412
Output:
VBoxManage.exe: error: Could not find file for the medium 'C:\ProgramData\BOINC\slots\0\vm_image.vdi' (VERR_FILE_NOT_FOUND)
VBoxManage.exe: error: Details: code VBOX_E_FILE_ERROR (0x80bb0004), component MediumWrap, interface IMedium, callee IUnknown
VBoxManage.exe: error: Context: "OpenMedium(Bstr(pszFilenameOrUuid).raw(), enmDevType, enmAccessMode, fForceNewUuidOnOpen, pMedium.asOutParam())" at line 191 of file VBoxManageDisk.cpp

2021-07-12 13:03:11 (12428): 
Command: VBoxManage -q createvm --name "boinc_6b054d96a0b9f61d" --basefolder "C:\ProgramData\BOINC\slots\0" --ostype "Linux26_64" --register
Exit Code: 0
Output:
Virtual machine 'boinc_6b054d96a0b9f61d' is created and registered.
UUID: 6e6ee0cc-6b79-4fa2-9eea-c3104606b61f
Settings file: 'C:\ProgramData\BOINC\slots\0\boinc_6b054d96a0b9f61d\boinc_6b054d96a0b9f61d.vbox'

2021-07-12 13:03:12 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --description "08398758_18_0" 
Exit Code: 0
Output:

2021-07-12 13:03:13 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --memory 3072 
Exit Code: 0
Output:

2021-07-12 13:03:15 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --cpus 1 
Exit Code: 0
Output:

2021-07-12 13:03:15 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --acpi on --ioapic on 
Exit Code: 0
Output:

2021-07-12 13:03:15 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --boot1 disk --boot2 dvd --boot3 none --boot4 none 
Exit Code: 0
Output:

2021-07-12 13:03:16 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --nic1 nat --natdnsproxy1 on --cableconnected1 off 
Exit Code: 0
Output:

2021-07-12 13:03:16 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --cableconnected1 on 
Exit Code: 0
Output:

2021-07-12 13:03:16 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --usb off 
Exit Code: 0
Output:

2021-07-12 13:03:16 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --uart1 off --uart2 off 
Exit Code: 0
Output:

2021-07-12 13:03:17 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --lpt1 off --lpt2 off 
Exit Code: 0
Output:

2021-07-12 13:03:17 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --audio none 
Exit Code: 0
Output:

2021-07-12 13:03:17 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --clipboard disabled 
Exit Code: 0
Output:

2021-07-12 13:03:17 (12428): 
Command: VBoxManage -q modifyvm "boinc_6b054d96a0b9f61d" --draganddrop disabled 
Exit Code: 0
Output:

2021-07-12 13:03:18 (12428): 
Command: VBoxManage -q storagectl "boinc_6b054d96a0b9f61d" --name "Hard Disk Controller" --add "sata" --controller "IntelAHCI" --hostiocache off --portcount 3
Exit Code: 0
Output:

2021-07-12 13:03:18 (12428): 
Command: VBoxManage -q storageattach "boinc_6b054d96a0b9f61d" --storagectl "Hard Disk Controller" --port 0 --device 0 --type dvddrive --medium "C:\ProgramData\BOINC\slots\0/vm_isocontext.iso" 
Exit Code: 0
Output:

2021-07-12 13:03:18 (12428): 
Command: VBoxManage -q storageattach "boinc_6b054d96a0b9f61d" --storagectl "Hard Disk Controller" --port 2 --device 0 --type dvddrive --medium "C:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso" 
Exit Code: 0
Output:

2021-07-12 13:03:19 (12428): 
Command: VBoxManage -q bandwidthctl "boinc_6b054d96a0b9f61d" add "boinc_6b054d96a0b9f61d_net" --type network --limit 1024G 
Exit Code: 0
Output:

2021-07-12 13:03:19 (12428): 
Command: VBoxManage -q sharedfolder add "boinc_6b054d96a0b9f61d" --name "shared" --hostpath "C:\ProgramData\BOINC\slots\0/shared"
Exit Code: 0
Output:

2021-07-12 13:03:22 (12428): 
Command: VBoxManage -q startvm "boinc_6b054d96a0b9f61d" --type headless
Exit Code: -2147467259
Output:
Waiting for VM "boinc_6b054d96a0b9f61d" to power on...
VBoxManage.exe: error: The native API dll was not found (C:\WINDOWS\system32\WinHvPlatform.dll) (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

2021-07-12 13:03:22 (12428): 
Command: VBoxManage -q snapshot "boinc_6b054d96a0b9f61d" list 
Exit Code: -108
Output:
This machine does not have any snapshots

2021-07-12 13:03:22 (12428): 
Command: VBoxManage -q bandwidthctl "boinc_6b054d96a0b9f61d" remove "boinc_6b054d96a0b9f61d_net" 
Exit Code: 0
Output:
VBoxManage.exe: error: Bandwidth groups cannot be deleted while the VM is running

2021-07-12 13:03:23 (12428): 
Command: VBoxManage -q unregistervm "boinc_6b054d96a0b9f61d" --delete 
Exit Code: 0
Output:
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

2021-07-12 13:03:23 (12428): 
Command: VBoxManage -q closemedium dvd "C:\ProgramData\BOINC\slots\0/vm_isocontext.iso" --delete 
Exit Code: 0
Output:
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

13:03:28 (12428): called boinc_finish(-2147467259)

</stderr_txt>
]]>


©2025 COPYRIGHT 2017-2018 NCN