Stderr output

<core_client_version>8.2.4</core_client_version>
<![CDATA[
<message>
Unspecified error
 (0x80004005) - exit code 2147500037 (0x80004005)</message>
<stderr_txt>
2025-11-21 03:40:15 (9824): vboxwrapper version 26210
2025-11-21 03:40:15 (9824): BOINC client version: 8.2.4
2025-11-21 03:40:17 (9824): Detected: VirtualBox VboxManage Interface (Version: 7.2.4)
2025-11-21 03:40:17 (9824): Successfully copied 'init_data.xml' to the shared directory.
2025-11-21 03:40:17 (9824): Create VM. (boinc_ba06dc7ad3abca0d, slot#2)
2025-11-21 03:40:18 (9824): Setting Memory Size for VM. (4700MB)
2025-11-21 03:40:19 (9824): Setting CPU Count for VM. (7)
2025-11-21 03:40:19 (9824): Setting Chipset Options for VM.
2025-11-21 03:40:19 (9824): Setting Graphics Controller Options for VM. (Driver: VBoxVGA, 16MB)
2025-11-21 03:40:20 (9824): Setting Boot Options for VM.
2025-11-21 03:40:20 (9824): Setting Network Configuration for NAT. (Driver: virtio)
2025-11-21 03:40:20 (9824): Enabling VM Network Access.
2025-11-21 03:40:21 (9824): Disabling USB Support for VM.
2025-11-21 03:40:21 (9824): Disabling COM Port Support for VM.
2025-11-21 03:40:21 (9824): Disabling LPT Port Support for VM.
2025-11-21 03:40:21 (9824): Disabling Audio Support for VM.
2025-11-21 03:40:22 (9824): Disabling Clipboard Support for VM.
2025-11-21 03:40:22 (9824): Disabling Drag and Drop Support for VM.
2025-11-21 03:40:22 (9824): Adding storage controller(s) to VM.
2025-11-21 03:40:22 (9824): Adding virtual disk drive to VM. (ATLAS_vbox_3.03_image.vdi)
2025-11-21 03:40:25 (9824): Adding VirtualBox Guest Additions to VM.
2025-11-21 03:40:25 (9824): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2025-11-21 03:40:25 (9824): forwarding host port 58372 to guest port 80
2025-11-21 03:40:25 (9824): Enabling remote desktop for VM.
2025-11-21 03:40:26 (9824): Enabling shared directory for VM.
2025-11-21 03:40:26 (9824): Starting VM using VBoxManage interface. (boinc_ba06dc7ad3abca0d, slot#2)
2025-11-21 03:40:33 (9824): Error in start VM for VM: -2147467259
Command:
VBoxManage -q startvm "boinc_ba06dc7ad3abca0d" --type headless
Output:
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
Waiting for VM "boinc_ba06dc7ad3abca0d" to power on...

2025-11-21 03:40:33 (9824): VM failed to start.
2025-11-21 03:40:33 (9824): Could not start 
2025-11-21 03:40:33 (9824): ERROR: VM failed to start
2025-11-21 03:40:33 (9824): Powering off VM.
2025-11-21 03:40:33 (9824): Deregistering VM. (boinc_ba06dc7ad3abca0d, slot#2)
2025-11-21 03:40:34 (9824): Removing network bandwidth throttle group from VM.
2025-11-21 03:40:34 (9824): Removing VM from VirtualBox.

    Hypervisor System Log:

00:00:08.621867          Finished saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox"
00:00:08.867276          Platform architecture set to 'x86'
00:00:08.870300          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 0 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:08.871300          Saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox" with version "1.19-windows"
00:00:08.915921          Finished saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox"
00:00:08.916280          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 0 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:08.919562          Saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox" with version "1.19-windows"
00:00:08.925127          Finished saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox"
00:00:08.926131          Saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox" with version "1.19-windows"
00:00:08.931732          Finished saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox"
00:00:09.150718          Platform architecture set to 'x86'
00:00:09.154157          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 1 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:09.157615          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 1 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:09.157943          Saving settings file "C:\Users\grise\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:09.168654          Finished saving settings file "C:\Users\grise\.VirtualBox\VirtualBox.xml"
00:00:09.169214          Saving settings file "C:\Users\grise\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:09.174160          Finished saving settings file "C:\Users\grise\.VirtualBox\VirtualBox.xml"
00:00:09.174890          Saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox" with version "1.19-windows"
00:00:09.184566          Finished saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox"
00:00:09.405240          Platform architecture set to 'x86'
00:00:09.407810          Saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox" with version "1.19-windows"
00:00:09.415109          Finished saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox"
00:00:09.672497          Platform architecture set to 'x86'
00:00:09.676155          Saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox" with version "1.19-windows"
00:00:09.682850          Finished saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox"
00:00:10.202660          Platform architecture set to 'x86'
00:00:10.205522          VRDE: Generating certificate files 'C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\VRDEAutoGeneratedCert.pem' and 'C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\VRDEAutoGeneratedPrivateKey.pem'...
00:00:10.308409          Saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox" with version "1.19-windows"
00:00:10.315866          Finished saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox"
00:00:10.467842          Platform architecture set to 'x86'
00:00:10.470175          Saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox" with version "1.19-windows"
00:00:10.476910          Finished saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox"
00:00:10.727035          Platform architecture set to 'x86'
00:00:10.730121          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={2ce10519-3c09-45d8-a12d-e887786146b7} aComponent={VirtualBoxWrap} aText={&#197;&#131;o extension pack providing a cryptographic support module could be found}, preserve=false aResultDetail=0
00:00:10.740609          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 2 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:10.740737          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 2 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:10.753150          ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={83cfdc66-4f20-4569-ad39-8722f7d472b3} aComponent={RecordingSettingsWrap} aText={Recording not started}, preserve=false aResultDetail=0
00:00:10.754731          ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0
00:00:11.015681          Launched VM: 79792352 pid: 9272 (0x2438) frontend: headless name: boinc_ba06dc7ad3abca0d
00:00:16.201918          Platform architecture set to 'x86'
00:00:17.924029          Saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox" with version "1.19-windows"
00:00:17.931506          Finished saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox"
00:00:18.051260          ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0
00:00:18.153878          Platform architecture set to 'x86'
00:00:18.157402          Saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox" with version "1.19-windows"
00:00:18.164964          Finished saving settings file "C:\ProgramData\BOINC\slots\2\boinc_ba06dc7ad3abca0d\boinc_ba06dc7ad3abca0d.vbox"
00:00:18.431076          Saving settings file "C:\Users\grise\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:18.438019          Finished saving settings file "C:\Users\grise\.VirtualBox\VirtualBox.xml"
00:00:18.438256          Saving settings file "C:\Users\grise\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:18.443632          Finished saving settings file "C:\Users\grise\.VirtualBox\VirtualBox.xml"
00:00:18.445477 DeleteVM Saving settings file "C:\Users\grise\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:18.451171 DeleteVM Finished saving settings file "C:\Users\grise\.VirtualBox\VirtualBox.xml"
00:00:23.463289 main     VirtualBox: object deletion starts
00:00:23.465974 main     HostDnsMonitor: shutting down ...
00:00:23.466066 main     HostDnsMonitor: shut down
00:00:23.468314 Watcher  ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={2ce10519-3c09-45d8-a12d-e887786146b7} aComponent={VirtualBoxWrap} aText={The object is not ready}, preserve=false aResultDetail=0
00:00:23.468722 main     VirtualBox: object deleted

    VM Execution Log:


    VM Startup Log:


    VM Trace Log:

p="disabled"
vrde="off"
usb="off"
ehci="off"
xhci="off"
recording_started="off"
recording_enabled="off"
recording_screens=1
 rec_screen0
rec_screen_enabled="on"
rec_screen_id=0
rec_screen_video_enabled="on"
rec_screen_audio_enabled="off"
rec_screen_dest="File"
rec_screen_dest_filename="C:\\ProgramData\\BOINC\\slots\\2\\boinc_ba06dc7ad3abca0d\\boinc_ba06dc7ad3abca0d-screen0.webm"
rec_screen_opts="ac_profile=med"
rec_screen_video_res_xy="1024x768"
rec_screen_video_rate_kbps=512
rec_screen_video_fps=25
description="aPlLDmewcf8nsSi4ap6QjLDmwznN0nGgGQJmNLGKDmpZFKDmVvQeqm_3"
GuestMemoryBalloon=0

2025-11-21 03:40:20 (9824): 
Command: VBoxManage -q modifyvm "boinc_ba06dc7ad3abca0d" --nic1 nat --nic-type1 "virtio" --cable-connected1 off --nat-dns-proxy1 on 
Exit Code: 0
Output:

2025-11-21 03:40:21 (9824): 
Command: VBoxManage -q modifyvm "boinc_ba06dc7ad3abca0d" --cable-connected1 on 
Exit Code: 0
Output:

2025-11-21 03:40:21 (9824): 
Command: VBoxManage -q modifyvm "boinc_ba06dc7ad3abca0d" --usb off 
Exit Code: 0
Output:

2025-11-21 03:40:21 (9824): 
Command: VBoxManage -q modifyvm "boinc_ba06dc7ad3abca0d" --uart1 off --uart2 off 
Exit Code: 0
Output:

2025-11-21 03:40:21 (9824): 
Command: VBoxManage -q modifyvm "boinc_ba06dc7ad3abca0d" --lpt1 off --lpt2 off 
Exit Code: 0
Output:

2025-11-21 03:40:22 (9824): 
Command: VBoxManage -q modifyvm "boinc_ba06dc7ad3abca0d" --audio-enabled off 
Exit Code: 0
Output:

2025-11-21 03:40:22 (9824): 
Command: VBoxManage -q modifyvm "boinc_ba06dc7ad3abca0d" --clipboard disabled 
Exit Code: 0
Output:

2025-11-21 03:40:22 (9824): 
Command: VBoxManage -q modifyvm "boinc_ba06dc7ad3abca0d" --draganddrop disabled 
Exit Code: 0
Output:

2025-11-21 03:40:22 (9824): 
Command: VBoxManage -q storagectl "boinc_ba06dc7ad3abca0d" --name "Hard Disk Controller" --add "sata" --controller "IntelAHCI" --hostiocache off --portcount 3
Exit Code: 0
Output:

2025-11-21 03:40:23 (9824): 
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:           multiattach
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

2025-11-21 03:40:23 (9824): 
Command: VBoxManage -q storageattach "boinc_ba06dc7ad3abca0d" --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: -2135228409
Output:
VBoxManage.exe: error: Cannot attach medium 'C:\ProgramData\BOINC\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.exe: error: Details: code VBOX_E_INVALID_OBJECT_STATE (0x80bb0007), component SessionMachine, interface IMachine, callee IUnknown
VBoxManage.exe: error: Context: "AttachDevice(Bstr(pszCtl).raw(), port, device, DeviceType_HardDisk, pMedium2Mount)" at line 786 of file VBoxManageStorageController.cpp

2025-11-21 03:40:23 (9824): 
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:           multiattach
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

2025-11-21 03:40:24 (9824): 
Command: VBoxManage -q closemedium disk "C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:

2025-11-21 03:40:24 (9824): 
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

2025-11-21 03:40:24 (9824): 
Command: VBoxManage -q storageattach "boinc_ba06dc7ad3abca0d" --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:

2025-11-21 03:40:24 (9824): 
Command: VBoxManage -q storageattach "boinc_ba06dc7ad3abca0d" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium none 
Exit Code: 0
Output:

2025-11-21 03:40:25 (9824): 
Command: VBoxManage -q storageattach "boinc_ba06dc7ad3abca0d" --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:

2025-11-21 03:40:25 (9824): 
Command: VBoxManage -q storageattach "boinc_ba06dc7ad3abca0d" --storagectl "Hard Disk Controller" --port 1 --device 0 --type dvddrive --medium "C:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso" 
Exit Code: 0
Output:

2025-11-21 03:40:25 (9824): 
Command: VBoxManage -q bandwidthctl "boinc_ba06dc7ad3abca0d" add "boinc_ba06dc7ad3abca0d_net" --type network --limit 1024G 
Exit Code: 0
Output:

2025-11-21 03:40:25 (9824): 
Command: VBoxManage -q modifyvm "boinc_ba06dc7ad3abca0d" --natpf1 ",tcp,127.0.0.1,58372,,80" 
Exit Code: 0
Output:

2025-11-21 03:40:26 (9824): 
Command: VBoxManage -q list extpacks
Exit Code: 0
Output:
Extension Packs: 1
Pack no. 0:   Oracle VM VirtualBox Extension Pack
Version:        7.0.12
Revision:       159484
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:         false
Why unusable:   VBoxExtPackRegister returned VERR_VERSION_MISMATCH, pReg=0000000000000000 ErrInfo='VirtualBox version mismatch - expected 7.0 got 7.2'

2025-11-21 03:40:26 (9824): 
Command: VBoxManage -q modifyvm "boinc_ba06dc7ad3abca0d" --vrde on --vrdeextpack default --vrdeauthlibrary default --vrdeauthtype null --vrdeport 58373 --vrde-property "Security/Method=RDP" 
Exit Code: 0
Output:

2025-11-21 03:40:26 (9824): 
Command: VBoxManage -q sharedfolder add "boinc_ba06dc7ad3abca0d" --name "shared" --hostpath "C:\ProgramData\BOINC\slots\2/shared"
Exit Code: 0
Output:

2025-11-21 03:40:33 (9824): 
Command: VBoxManage -q startvm "boinc_ba06dc7ad3abca0d" --type headless
Exit Code: -2147467259
Output:
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
Waiting for VM "boinc_ba06dc7ad3abca0d" to power on...

2025-11-21 03:40:34 (9824): 
Command: VBoxManage -q snapshot "boinc_ba06dc7ad3abca0d" list 
Exit Code: -108
Output:
This machine does not have any snapshots

2025-11-21 03:40:34 (9824): 
Command: VBoxManage -q bandwidthctl "boinc_ba06dc7ad3abca0d" remove "boinc_ba06dc7ad3abca0d_net" 
Exit Code: 0
Output:

2025-11-21 03:40:34 (9824): 
Command: VBoxManage -q unregistervm "boinc_ba06dc7ad3abca0d" --delete 
Exit Code: 0
Output:
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

2025-11-21 03:40:39 (9824): called boinc_finish(-2147467259)

</stderr_txt>
]]>

©2025 CERN