Stderr output

<core_client_version>8.0.2</core_client_version>
<![CDATA[
<message>
Unspecified error
 (0x80004005) - exit code 2147500037 (0x80004005)</message>
<stderr_txt>
2025-10-08 16:05:07 (8016): vboxwrapper version 26210
2025-10-08 16:05:07 (8016): BOINC client version: 8.0.2
2025-10-08 16:05:08 (8016): Detected: VirtualBox VboxManage Interface (Version: 6.1.12)
2025-10-08 16:05:08 (8016): Successfully copied 'init_data.xml' to the shared directory.
2025-10-08 16:05:08 (8016): Create VM. (boinc_63bca781b27e71ad, slot#11)
2025-10-08 16:05:10 (8016): Setting Memory Size for VM. (4800MB)
2025-10-08 16:05:10 (8016): Setting CPU Count for VM. (8)
2025-10-08 16:05:11 (8016): Setting Chipset Options for VM.
2025-10-08 16:05:11 (8016): Setting Graphics Controller Options for VM. (Driver: VBoxVGA, 16MB)
2025-10-08 16:05:12 (8016): Setting Boot Options for VM.
2025-10-08 16:05:12 (8016): Setting Network Configuration for NAT. (Driver: virtio)
2025-10-08 16:05:13 (8016): Enabling VM Network Access.
2025-10-08 16:05:13 (8016): Disabling USB Support for VM.
2025-10-08 16:05:13 (8016): Disabling COM Port Support for VM.
2025-10-08 16:05:13 (8016): Disabling LPT Port Support for VM.
2025-10-08 16:05:14 (8016): Disabling Audio Support for VM.
2025-10-08 16:05:14 (8016): Disabling Clipboard Support for VM.
2025-10-08 16:05:15 (8016): Disabling Drag and Drop Support for VM.
2025-10-08 16:05:15 (8016): Adding storage controller(s) to VM.
2025-10-08 16:05:15 (8016): Adding virtual disk drive to VM. (ATLAS_vbox_3.03_image.vdi)
2025-10-08 16:05:17 (8016): Adding VirtualBox Guest Additions to VM.
2025-10-08 16:05:17 (8016): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2025-10-08 16:05:17 (8016): forwarding host port 61321 to guest port 80
2025-10-08 16:05:18 (8016): Enabling remote desktop for VM.
2025-10-08 16:05:18 (8016): Required extension pack not installed, remote desktop not enabled.
2025-10-08 16:05:18 (8016): Enabling shared directory for VM.
2025-10-08 16:05:19 (8016): Starting VM using VBoxManage interface. (boinc_63bca781b27e71ad, slot#11)
2025-10-08 16:05:21 (8016): Error in start VM for VM: -2147467259
Command:
VBoxManage -q startvm "boinc_63bca781b27e71ad" --type headless
Output:
Waiting for VM "boinc_63bca781b27e71ad" 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

2025-10-08 16:05:21 (8016): VM failed to start.
2025-10-08 16:05:21 (8016): Could not start 
2025-10-08 16:05:21 (8016): ERROR: VM failed to start
2025-10-08 16:05:21 (8016): Powering off VM.
2025-10-08 16:05:21 (8016): Deregistering VM. (boinc_63bca781b27e71ad, slot#11)
2025-10-08 16:05:21 (8016): Removing network bandwidth throttle group from VM.
2025-10-08 16:05:21 (8016): Removing VM from VirtualBox.

    Hypervisor System Log:

00:00:02.357275          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:02.887480          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:03.417046          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:03.958519          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:04.490104          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:04.753795          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:05.030473          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
00:00:05.278644          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:05.807044          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:06.075557          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:06.342719          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:06.605426          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:07.140790          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:07.405287          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:07.673298          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:07.943750          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:08.731504          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
00:00:08.731918          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
00:00:08.732096          Saving settings file "C:\Users\Scantrontb\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:08.752672          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:08.999259          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:09.258956          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
00:00:09.259438          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:09.347513          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
00:00:09.349073          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:09.432464          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:09.791996          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
00:00:09.801591          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
00:00:09.801737          Saving settings file "C:\Users\Scantrontb\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:09.917418          Saving settings file "C:\Users\Scantrontb\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:09.959770          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:10.323775          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:10.591197          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:11.120247          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:11.388073          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
00:00:11.388194          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
00:00:11.394599          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
00:00:11.652522          Launched VM: 75418896 pid: 1532 (0x5fc) frontend: headless name: boinc_63bca781b27e71ad
00:00:14.057506          Saving settings file "C:\ProgramData\BOINC\slots\11\boinc_63bca781b27e71ad\boinc_63bca781b27e71ad.vbox" with version "1.16-windows"
00:00:14.126165          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
00:00:14.418290          ERROR [COM]: aRC=VBOX_E_INVALID_OBJECT_STATE (0x80bb0007) aIID={85632c68-b5bb-4316-a900-5eb28d3413df} aComponent={MachineWrap} aText={Cannot unregister the machine 'boinc_63bca781b27e71ad' while it is locked}, preserve=false aResultDetail=0
00:00:15.695715          Saving settings file "C:\Users\Scantrontb\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:20.735552 main     VirtualBox: object deletion starts
00:00:20.736213 main     HostDnsMonitor: shutting down ...
00:00:20.736247 main     HostDnsMonitor: shut down
00:00:20.737381 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
00:00:20.737534 main     VirtualBox: object deleted

    VM Execution Log:


    VM Startup Log:


    VM Trace Log:

(8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --cpus 8 
Exit Code: 0
Output:

2025-10-08 16:05:11 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --acpi on --ioapic on --rtcuseutc off 
Exit Code: 0
Output:

2025-10-08 16:05:12 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --vram 16 --graphicscontroller VBoxVGA 
Exit Code: 0
Output:

2025-10-08 16:05:12 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --boot1 disk --boot2 dvd --boot3 none --boot4 none 
Exit Code: 0
Output:

2025-10-08 16:05:12 (8016): 
Command: VBoxManage -q showvminfo "boinc_63bca781b27e71ad" --machinereadable 
Exit Code: 0
Output:
name="boinc_63bca781b27e71ad"
groups="/"
ostype="Linux 2.6 / 3.x / 4.x (64-bit)"
UUID="8595d331-cbb4-4c8f-ad0d-2aebe9169b5e"
CfgFile="C:\\ProgramData\\BOINC\\slots\\11\\boinc_63bca781b27e71ad\\boinc_63bca781b27e71ad.vbox"
SnapFldr="C:\\ProgramData\\BOINC\\slots\\11\\boinc_63bca781b27e71ad\\Snapshots"
LogFldr="C:\\ProgramData\\BOINC\\slots\\11\\boinc_63bca781b27e71ad\\Logs"
hardwareuuid="8595d331-cbb4-4c8f-ad0d-2aebe9169b5e"
memory=4800
pagefusion="off"
vram=16
cpuexecutioncap=100
hpet="off"
cpu-profile="host"
chipset="piix3"
firmware="BIOS"
cpus=8
pae="on"
longmode="on"
triplefaultreset="off"
apic="on"
x2apic="on"
nested-hw-virt="off"
cpuid-portability-level=0
bootmenu="messageandmenu"
boot1="disk"
boot2="dvd"
boot3="none"
boot4="none"
acpi="on"
ioapic="on"
biosapic="apic"
biossystemtimeoffset=0
rtcuseutc="off"
hwvirtex="on"
nestedpaging="on"
largepages="on"
vtxvpid="on"
vtxux="on"
paravirtprovider="default"
effparavirtprovider="kvm"
VMState="poweroff"
VMStateChangeTime="2025-10-08T23:05:08.701000000"
graphicscontroller="vboxvga"
monitorcount=1
accelerate3d="off"
accelerate2dvideo="off"
teleporterenabled="off"
teleporterport=0
teleporteraddress=""
teleporterpassword=""
tracing-enabled="off"
tracing-allow-vm-access="off"
tracing-config=""
autostart-enabled="off"
autostart-delay=0
defaultfrontend=""
vmprocpriority="default"
natnet1="nat"
macaddress1="0800278CC7F3"
cableconnected1="on"
nic1="nat"
nictype1="82540EM"
nicspeed1="0"
mtu="0"
sockSnd="64"
sockRcv="64"
tcpWndSnd="64"
tcpWndRcv="64"
nic2="none"
nic3="none"
nic4="none"
nic5="none"
nic6="none"
nic7="none"
nic8="none"
hidpointing="ps2mouse"
hidkeyboard="ps2kbd"
uart1="off"
uart2="off"
uart3="off"
uart4="off"
lpt1="off"
lpt2="off"
audio="dsound"
audio_out="off"
audio_in="off"
clipboard="disabled"
draganddrop="disabled"
vrde="off"
usb="off"
ehci="off"
xhci="off"
videocap="off"
videocapaudio="off"
capturescreens=""
capturefilename="C:\\ProgramData\\BOINC\\slots\\11\\boinc_63bca781b27e71ad\\boinc_63bca781b27e71ad.webm"
captureres="1024x768"
capturevideorate=512
capturevideofps=25
captureopts=""
description="AO8KDmbKsQ8nsSi4ap6QjLDmwznN0nGgGQJmUXzaDmDRYNDmAguJpn_0"
GuestMemoryBalloon=0

2025-10-08 16:05:13 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --nic1 nat --nictype1 "virtio" --cableconnected1 off --natdnsproxy1 on 
Exit Code: 0
Output:

2025-10-08 16:05:13 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --cableconnected1 on 
Exit Code: 0
Output:

2025-10-08 16:05:13 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --usb off 
Exit Code: 0
Output:

2025-10-08 16:05:13 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --uart1 off --uart2 off 
Exit Code: 0
Output:

2025-10-08 16:05:14 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --lpt1 off --lpt2 off 
Exit Code: 0
Output:

2025-10-08 16:05:14 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --audio none 
Exit Code: 0
Output:

2025-10-08 16:05:15 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --clipboard disabled 
Exit Code: 0
Output:

2025-10-08 16:05:15 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --draganddrop disabled 
Exit Code: 0
Output:

2025-10-08 16:05:15 (8016): 
Command: VBoxManage -q storagectl "boinc_63bca781b27e71ad" --name "Hard Disk Controller" --add "sata" --controller "IntelAHCI" --hostiocache off --portcount 3
Exit Code: 0
Output:

2025-10-08 16:05:16 (8016): 
Command: VBoxManage -q showhdinfo "C:\ProgramData\BOINC/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:       C:\ProgramData\BOINC\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

2025-10-08 16:05:16 (8016): 
Command: VBoxManage -q storageattach "boinc_63bca781b27e71ad" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:

2025-10-08 16:05:16 (8016): 
Command: VBoxManage -q storageattach "boinc_63bca781b27e71ad" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium none 
Exit Code: 0
Output:

2025-10-08 16:05:17 (8016): 
Command: VBoxManage -q storageattach "boinc_63bca781b27e71ad" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --mtype multiattach --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:

2025-10-08 16:05:17 (8016): 
Command: VBoxManage -q storageattach "boinc_63bca781b27e71ad" --storagectl "Hard Disk Controller" --port 1 --device 0 --type dvddrive --medium "C:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso" 
Exit Code: 0
Output:

2025-10-08 16:05:17 (8016): 
Command: VBoxManage -q bandwidthctl "boinc_63bca781b27e71ad" add "boinc_63bca781b27e71ad_net" --type network --limit 1024G 
Exit Code: 0
Output:

2025-10-08 16:05:18 (8016): 
Command: VBoxManage -q modifyvm "boinc_63bca781b27e71ad" --natpf1 ",tcp,127.0.0.1,61321,,80" 
Exit Code: 0
Output:

2025-10-08 16:05:18 (8016): 
Command: VBoxManage -q list extpacks
Exit Code: 0
Output:
Extension Packs: 0

2025-10-08 16:05:18 (8016): 
Command: VBoxManage -q sharedfolder add "boinc_63bca781b27e71ad" --name "shared" --hostpath "C:\ProgramData\BOINC\slots\11/shared"
Exit Code: 0
Output:

2025-10-08 16:05:21 (8016): 
Command: VBoxManage -q startvm "boinc_63bca781b27e71ad" --type headless
Exit Code: -2147467259
Output:
Waiting for VM "boinc_63bca781b27e71ad" 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

2025-10-08 16:05:21 (8016): 
Command: VBoxManage -q snapshot "boinc_63bca781b27e71ad" list 
Exit Code: -108
Output:
This machine does not have any snapshots

2025-10-08 16:05:21 (8016): 
Command: VBoxManage -q bandwidthctl "boinc_63bca781b27e71ad" remove "boinc_63bca781b27e71ad_net" 
Exit Code: 0
Output:
VBoxManage.exe: error: Bandwidth groups cannot be deleted while the VM is running

2025-10-08 16:05:22 (8016): 
Command: VBoxManage -q unregistervm "boinc_63bca781b27e71ad" --delete 
Exit Code: -2135228409
Output:
VBoxManage.exe: error: Cannot unregister the machine 'boinc_63bca781b27e71ad' 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

2025-10-08 16:05:23 (8016): 
Command: VBoxManage -q unregistervm "boinc_63bca781b27e71ad" --delete 
Exit Code: 0
Output:
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

2025-10-08 16:05:28 (8016): called boinc_finish(-2147467259)

</stderr_txt>
]]>

©2025 CERN