Name Theory_2843-4154559-520_0
Workunit 230777404
Created 11 Mar 2025, 6:41:36 UTC
Sent 11 Mar 2025, 18:06:09 UTC
Report deadline 22 Mar 2025, 18:06:09 UTC
Received 12 Mar 2025, 4:00:25 UTC
Server state Over
Outcome Computation error
Client state Compute error
Exit status -2147467259 (0x80004005) Unknown error code
Computer ID 10823474
Run time 9 sec
CPU time
Validate state Invalid
Credit 0.00
Device peak FLOPS 5.32 GFLOPS
Application version Theory Simulation v300.60 (vbox64_theory)
windows_x86_64
Peak working set size 10.42 MB
Peak swap size 6.23 MB
Peak disk usage 1.07 MB

Stderr output

<core_client_version>7.24.1</core_client_version>
<![CDATA[
<message>
Unspecified error
 (0x80004005) - exit code 2147500037 (0x80004005)</message>
<stderr_txt>
2025-03-11 22:55:23 (13584): vboxwrapper version 26208
2025-03-11 22:55:23 (13584): BOINC client version: 7.24.1
2025-03-11 23:54:55 (13584): Detected: VirtualBox VboxManage Interface (Version: 7.0.6)
2025-03-11 23:54:55 (13584): Detected: Heartbeat check (file: 'heartbeat' every 1200.000000 seconds)
2025-03-11 23:54:55 (13584): Successfully copied 'init_data.xml' to the shared directory.
2025-03-11 23:54:55 (13584): Successfully copied 'input' to the shared directory.
2025-03-11 23:54:56 (13584): Create VM. (boinc_9e10dcddead9905a, slot#1)
2025-03-11 23:54:56 (13584): Setting Memory Size for VM. (630MB)
2025-03-11 23:54:56 (13584): Setting CPU Count for VM. (1)
2025-03-11 23:54:57 (13584): Setting Chipset Options for VM.
2025-03-11 23:54:57 (13584): Setting Graphics Controller Options for VM.
2025-03-11 23:54:57 (13584): Setting Boot Options for VM.
2025-03-11 23:54:57 (13584): Setting Network Configuration for NAT.
2025-03-11 23:54:58 (13584): Enabling VM Network Access.
2025-03-11 23:54:58 (13584): Disabling USB Support for VM.
2025-03-11 23:54:58 (13584): Disabling COM Port Support for VM.
2025-03-11 23:54:59 (13584): Disabling LPT Port Support for VM.
2025-03-11 23:54:59 (13584): Disabling Audio Support for VM.
2025-03-11 23:54:59 (13584): Disabling Clipboard Support for VM.
2025-03-11 23:54:59 (13584): Disabling Drag and Drop Support for VM.
2025-03-11 23:55:00 (13584): Adding storage controller(s) to VM.
2025-03-11 23:55:00 (13584): Adding virtual disk drive to VM. (Theory_2025_01_16_prod.vdi)
2025-03-11 23:55:05 (13584): Attempts: 3
2025-03-11 23:55:05 (13584): Adding VirtualBox Guest Additions to VM.
2025-03-11 23:55:06 (13584): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2025-03-11 23:55:06 (13584): forwarding host port 49907 to guest port 80
2025-03-11 23:55:06 (13584): Enabling remote desktop for VM.
2025-03-11 23:55:06 (13584): Required extension pack not installed, remote desktop not enabled.
2025-03-11 23:55:06 (13584): Enabling shared directory for VM.
2025-03-11 23:55:07 (13584): Starting VM using VBoxManage interface. (boinc_9e10dcddead9905a, slot#1)
2025-03-11 23:55:13 (13584): Error in start VM for VM: -2147467259
Command:
VBoxManage -q startvm "boinc_9e10dcddead9905a" --type headless
Output:
VBoxManage.exe: error: Not in a hypervisor partition (HVP=0) (VERR_NEM_NOT_AVAILABLE).
VBoxManage.exe: error: AMD-V is disabled in the BIOS (or by the host OS) (VERR_SVM_DISABLED)
VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component ConsoleWrap, interface IConsole
Waiting for VM "boinc_9e10dcddead9905a" to power on...

2025-03-11 23:55:13 (13584): VM failed to start.
2025-03-11 23:55:13 (13584): Could not start 
2025-03-11 23:55:13 (13584): ERROR: VM failed to start
2025-03-11 23:55:13 (13584): Powering off VM.
2025-03-11 23:55:13 (13584): Deregistering VM. (boinc_9e10dcddead9905a, slot#1)
2025-03-11 23:55:13 (13584): Removing network bandwidth throttle group from VM.
2025-03-11 23:55:13 (13584): Removing VM from VirtualBox.

    Hypervisor System Log:

00:00:18.370066          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.370073          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.370079          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.370086          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.370093          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.370099          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.371684          ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0
00:00:18.413489          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.413511          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.413519          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.413525          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.413532          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.413538          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.413544          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.413551          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.415605          Saving settings file "C:\ProgramData\BOINC\slots\1\boinc_9e10dcddead9905a\boinc_9e10dcddead9905a.vbox" with version "1.19-windows"
00:00:18.421134          Finished saving settings file "C:\ProgramData\BOINC\slots\1\boinc_9e10dcddead9905a\boinc_9e10dcddead9905a.vbox"
00:00:18.676041          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676063          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676072          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676078          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676085          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676091          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676097          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676103          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676403          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676423          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676431          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676439          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676445          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676451          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676458          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676465          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.676544          Saving settings file "C:\Users\Greg\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:18.680561          Finished saving settings file "C:\Users\Greg\.VirtualBox\VirtualBox.xml"
00:00:18.680669          Saving settings file "C:\Users\Greg\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:18.684691          Finished saving settings file "C:\Users\Greg\.VirtualBox\VirtualBox.xml"
00:00:18.685467 DeleteVM Saving settings file "C:\Users\Greg\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:18.689812 DeleteVM Finished saving settings file "C:\Users\Greg\.VirtualBox\VirtualBox.xml"
00:00:23.711698 main     VirtualBox: object deletion starts
00:00:23.712429 main     HostDnsMonitor: shutting down ...
00:00:23.712450 main     HostDnsMonitor: shut down
00:00:23.713020 Watcher  ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={7682d5eb-f00e-44f1-8ca2-99d08b1cd607} aComponent={VirtualBoxWrap} aText={The object is not ready}, preserve=false aResultDetail=0
00:00:23.713278 main     VirtualBox: object deleted

    VM Execution Log:


    VM Startup Log:


    VM Trace Log:

L:                       
User language:                   C

2025-03-11 23:54:55 (13584): 
Command: VBoxManage -q list hostinfo 
Exit Code: 0
Output:
Host Information:

Host time: 2025-03-12T03:54:55.581000000Z
Processor online count: 16
Processor count: 16
Processor online core count: 8
Processor core count: 8
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 supports virt. vmsave/vmload: no
Processor#0 speed: unknown
Processor#0 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#1 speed: unknown
Processor#1 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#2 speed: unknown
Processor#2 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#3 speed: unknown
Processor#3 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#4 speed: unknown
Processor#4 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#5 speed: unknown
Processor#5 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#6 speed: unknown
Processor#6 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#7 speed: unknown
Processor#7 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#8 speed: unknown
Processor#8 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#9 speed: unknown
Processor#9 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#10 speed: unknown
Processor#10 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#11 speed: unknown
Processor#11 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#12 speed: unknown
Processor#12 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#13 speed: unknown
Processor#13 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#14 speed: unknown
Processor#14 description: AMD Ryzen 7 3800X 8-Core Processor
Processor#15 speed: unknown
Processor#15 description: AMD Ryzen 7 3800X 8-Core Processor
Memory size: 32716 MByte
Memory available: 27627 MByte
Operating system: Windows 10
Operating system version: 10.0.19045

2025-03-11 23:54:56 (13584): 
Command: VBoxManage -q showvminfo "boinc_9e10dcddead9905a" --machinereadable 
Exit Code: -2135228415
Output:
VBoxManage.exe: error: Could not find a registered machine named 'boinc_9e10dcddead9905a'
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 3139 of file VBoxManageInfo.cpp

2025-03-11 23:54:56 (13584): 
Command: VBoxManage -q createvm --name "boinc_9e10dcddead9905a" --basefolder "C:\ProgramData\BOINC\slots\1" --ostype "Linux26_64" --register
Exit Code: 0
Output:
Virtual machine 'boinc_9e10dcddead9905a' is created and registered.
UUID: a474d2e5-403d-4809-a40e-c12016d78378
Settings file: 'C:\ProgramData\BOINC\slots\1\boinc_9e10dcddead9905a\boinc_9e10dcddead9905a.vbox'

2025-03-11 23:54:56 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --description "Theory_2843-4154559-520_0" 
Exit Code: 0
Output:

2025-03-11 23:54:56 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --memory 630 
Exit Code: 0
Output:

2025-03-11 23:54:57 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --cpus 1 
Exit Code: 0
Output:

2025-03-11 23:54:57 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --acpi on --ioapic on --rtcuseutc off 
Exit Code: 0
Output:

2025-03-11 23:54:57 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --vram 16 --graphicscontroller VBoxVGA 
Exit Code: 0
Output:

2025-03-11 23:54:57 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --boot1 disk --boot2 dvd --boot3 none --boot4 none 
Exit Code: 0
Output:

2025-03-11 23:54:58 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --nic1 nat --natdnsproxy1 on --cableconnected1 off 
Exit Code: 0
Output:

2025-03-11 23:54:58 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --cableconnected1 on 
Exit Code: 0
Output:

2025-03-11 23:54:58 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --usb off 
Exit Code: 0
Output:

2025-03-11 23:54:59 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --uart1 off --uart2 off 
Exit Code: 0
Output:

2025-03-11 23:54:59 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --lpt1 off --lpt2 off 
Exit Code: 0
Output:

2025-03-11 23:54:59 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --audio-enabled off 
Exit Code: 0
Output:

2025-03-11 23:54:59 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --clipboard disabled 
Exit Code: 0
Output:

2025-03-11 23:55:00 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --draganddrop disabled 
Exit Code: 0
Output:

2025-03-11 23:55:00 (13584): 
Command: VBoxManage -q storagectl "boinc_9e10dcddead9905a" --name "Hard Disk Controller" --add "sata" --controller "IntelAHCI" --hostiocache off --portcount 3
Exit Code: 0
Output:

2025-03-11 23:55:05 (13584): 
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:           multiattach
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
Child UUIDs:    5eccb5ee-63c6-42cd-9903-f14677d3195f
                064eb8c9-7430-4831-a216-8424c35292ee

2025-03-11 23:55:05 (13584): 
Command: VBoxManage -q storageattach "boinc_9e10dcddead9905a" --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:

2025-03-11 23:55:06 (13584): 
Command: VBoxManage -q storageattach "boinc_9e10dcddead9905a" --storagectl "Hard Disk Controller" --port 1 --device 0 --type dvddrive --medium "C:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso" 
Exit Code: 0
Output:

2025-03-11 23:55:06 (13584): 
Command: VBoxManage -q bandwidthctl "boinc_9e10dcddead9905a" add "boinc_9e10dcddead9905a_net" --type network --limit 1024G 
Exit Code: 0
Output:

2025-03-11 23:55:06 (13584): 
Command: VBoxManage -q modifyvm "boinc_9e10dcddead9905a" --natpf1 ",tcp,127.0.0.1,49907,,80" 
Exit Code: 0
Output:

2025-03-11 23:55:06 (13584): 
Command: VBoxManage -q list extpacks
Exit Code: 0
Output:
Extension Packs: 0

2025-03-11 23:55:07 (13584): 
Command: VBoxManage -q sharedfolder add "boinc_9e10dcddead9905a" --name "shared" --hostpath "C:\ProgramData\BOINC\slots\1/shared"
Exit Code: 0
Output:

2025-03-11 23:55:13 (13584): 
Command: VBoxManage -q startvm "boinc_9e10dcddead9905a" --type headless
Exit Code: -2147467259
Output:
VBoxManage.exe: error: Not in a hypervisor partition (HVP=0) (VERR_NEM_NOT_AVAILABLE).
VBoxManage.exe: error: AMD-V is disabled in the BIOS (or by the host OS) (VERR_SVM_DISABLED)
VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component ConsoleWrap, interface IConsole
Waiting for VM "boinc_9e10dcddead9905a" to power on...

2025-03-11 23:55:13 (13584): 
Command: VBoxManage -q snapshot "boinc_9e10dcddead9905a" list 
Exit Code: -108
Output:
This machine does not have any snapshots

2025-03-11 23:55:13 (13584): 
Command: VBoxManage -q bandwidthctl "boinc_9e10dcddead9905a" remove "boinc_9e10dcddead9905a_net" 
Exit Code: 0
Output:

2025-03-11 23:55:13 (13584): 
Command: VBoxManage -q unregistervm "boinc_9e10dcddead9905a" --delete 
Exit Code: 0
Output:
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

2025-03-11 23:55:18 (13584): called boinc_finish(-2147467259)

</stderr_txt>
]]>


©2025 CERN