Stderr output

<core_client_version>8.0.2</core_client_version>
<![CDATA[
<message>
Unspecified error
 (0x80004005) - exit code 2147500037 (0x80004005)</message>
<stderr_txt>
2024-10-10 17:51:05 (12928): vboxwrapper version 26207
2024-10-10 17:51:05 (12928): BOINC client version: 8.0.2
2024-10-10 17:51:06 (12928): Detected: VirtualBox VboxManage Interface (Version: 7.0.6)
2024-10-10 17:51:06 (12928): Detected: Heartbeat check (file: 'heartbeat' every 1200.000000 seconds)
2024-10-10 17:51:06 (12928): Successfully copied 'init_data.xml' to the shared directory.
2024-10-10 17:51:06 (12928): Successfully copied 'input' to the shared directory.
2024-10-10 17:51:06 (12928): Create VM. (boinc_bdfe9cb5f9769887, slot#6)
2024-10-10 17:51:07 (12928): Setting Memory Size for VM. (630MB)
2024-10-10 17:51:07 (12928): Setting CPU Count for VM. (1)
2024-10-10 17:51:07 (12928): Setting Chipset Options for VM.
2024-10-10 17:51:07 (12928): Setting Graphics Controller Options for VM.
2024-10-10 17:51:08 (12928): Setting Boot Options for VM.
2024-10-10 17:51:08 (12928): Setting Network Configuration for NAT.
2024-10-10 17:51:08 (12928): Enabling VM Network Access.
2024-10-10 17:51:09 (12928): Disabling USB Support for VM.
2024-10-10 17:51:09 (12928): Disabling COM Port Support for VM.
2024-10-10 17:51:09 (12928): Disabling LPT Port Support for VM.
2024-10-10 17:51:09 (12928): Disabling Audio Support for VM.
2024-10-10 17:51:10 (12928): Disabling Clipboard Support for VM.
2024-10-10 17:51:10 (12928): Disabling Drag and Drop Support for VM.
2024-10-10 17:51:10 (12928): Adding storage controller(s) to VM.
2024-10-10 17:51:10 (12928): Adding virtual disk drive to VM. (Theory_2024_04_30_prod.vdi)
2024-10-10 17:51:13 (12928): Adding VirtualBox Guest Additions to VM.
2024-10-10 17:51:13 (12928): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2024-10-10 17:51:13 (12928): forwarding host port 62149 to guest port 80
2024-10-10 17:51:13 (12928): Enabling remote desktop for VM.
2024-10-10 17:51:14 (12928): Required extension pack not installed, remote desktop not enabled.
2024-10-10 17:51:14 (12928): Enabling shared directory for VM.
2024-10-10 17:51:14 (12928): Starting VM using VBoxManage interface. (boinc_bdfe9cb5f9769887, slot#6)
2024-10-10 17:51:17 (12928): Error in start VM for VM: -2147467259
Command:
VBoxManage -q startvm "boinc_bdfe9cb5f9769887" --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_bdfe9cb5f9769887" to power on...

2024-10-10 17:51:17 (12928): VM failed to start.
2024-10-10 17:51:17 (12928): Could not start 
2024-10-10 17:51:17 (12928): ERROR: VM failed to start
2024-10-10 17:51:17 (12928): Powering off VM.
2024-10-10 17:51:17 (12928): Deregistering VM. (boinc_bdfe9cb5f9769887, slot#6)
2024-10-10 17:51:18 (12928): Removing network bandwidth throttle group from VM.
2024-10-10 17:51:18 (12928): Removing VM from VirtualBox.

    Hypervisor System Log:

00:00:18.069770          Saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox" with version "1.19-windows"
00:00:18.100794          Finished saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox"
00:00:18.100843          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.101242          Saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox" with version "1.19-windows"
00:00:18.127155          Finished saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox"
00:00:18.287289          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.288916          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 1 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:18.289173          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 1 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:18.289249          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.289358          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.289383          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.289639          Saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox" with version "1.19-windows"
00:00:18.326932          Finished saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox"
00:00:18.553344          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.554976          Saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox" with version "1.19-windows"
00:00:18.563820          Finished saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox"
00:00:18.821998          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:18.824385          Saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox" with version "1.19-windows"
00:00:18.835474          Finished saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox"
00:00:19.333457          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:19.334944          Saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox" with version "1.19-windows"
00:00:19.375695          Finished saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox"
00:00:19.600560          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:19.602076          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={7682d5eb-f00e-44f1-8ca2-99d08b1cd607} aComponent={VirtualBoxWrap} aText={&#197;&#131;o extension pack providing a cryptographic support module could be found}, preserve=false aResultDetail=0
00:00:19.606446          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 2 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:19.606503          ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 2 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0
00:00:19.611676          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
00:00:19.855247          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:19.859435          Launched VM: 2818784144 pid: 21784 (0x5518) frontend: headless name: boinc_bdfe9cb5f9769887
00:00:23.189626          Saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox" with version "1.19-windows"
00:00:23.211846          Finished saving settings file "C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox"
00:00:23.256725          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:23.257816          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
00:00:23.296111          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:23.560314          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:23.560555          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:23.560608          Saving settings file "C:\Users\Erik\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:23.577798          Finished saving settings file "C:\Users\Erik\.VirtualBox\VirtualBox.xml"
00:00:23.577875          Saving settings file "C:\Users\Erik\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:23.602544          Finished saving settings file "C:\Users\Erik\.VirtualBox\VirtualBox.xml"
00:00:23.603187 DeleteVM Saving settings file "C:\Users\Erik\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:23.615154 DeleteVM Finished saving settings file "C:\Users\Erik\.VirtualBox\VirtualBox.xml"
00:00:28.618964 main     VirtualBox: object deletion starts
00:00:28.619769 main     HostDnsMonitor: shutting down ...
00:00:28.619793 main     HostDnsMonitor: shut down
00:00:28.620661 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
00:00:28.620898 main     VirtualBox: object deleted

    VM Execution Log:


    VM Startup Log:


    VM Trace Log:

: 
Command: VBoxManage -q createvm --name "boinc_bdfe9cb5f9769887" --basefolder "C:\ProgramData\BOINC\slots\6" --ostype "Linux26_64" --register
Exit Code: 0
Output:
Virtual machine 'boinc_bdfe9cb5f9769887' is created and registered.
UUID: 9bf71041-4f65-40e6-8d82-2f8758f2ace3
Settings file: 'C:\ProgramData\BOINC\slots\6\boinc_bdfe9cb5f9769887\boinc_bdfe9cb5f9769887.vbox'

2024-10-10 17:51:07 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --description "Theory_2794-3267754-214_0" 
Exit Code: 0
Output:

2024-10-10 17:51:07 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --memory 630 
Exit Code: 0
Output:

2024-10-10 17:51:07 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --cpus 1 
Exit Code: 0
Output:

2024-10-10 17:51:07 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --acpi on --ioapic on --rtcuseutc off 
Exit Code: 0
Output:

2024-10-10 17:51:08 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --vram 16 --graphicscontroller VBoxVGA 
Exit Code: 0
Output:

2024-10-10 17:51:08 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --boot1 disk --boot2 dvd --boot3 none --boot4 none 
Exit Code: 0
Output:

2024-10-10 17:51:08 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --nic1 nat --natdnsproxy1 on --cableconnected1 off 
Exit Code: 0
Output:

2024-10-10 17:51:09 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --cableconnected1 on 
Exit Code: 0
Output:

2024-10-10 17:51:09 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --usb off 
Exit Code: 0
Output:

2024-10-10 17:51:09 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --uart1 off --uart2 off 
Exit Code: 0
Output:

2024-10-10 17:51:09 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --lpt1 off --lpt2 off 
Exit Code: 0
Output:

2024-10-10 17:51:10 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --audio-enabled off 
Exit Code: 0
Output:

2024-10-10 17:51:10 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --clipboard disabled 
Exit Code: 0
Output:

2024-10-10 17:51:10 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --draganddrop disabled 
Exit Code: 0
Output:

2024-10-10 17:51:10 (12928): 
Command: VBoxManage -q storagectl "boinc_bdfe9cb5f9769887" --name "Hard Disk Controller" --add "sata" --controller "IntelAHCI" --hostiocache off --portcount 3
Exit Code: 0
Output:

2024-10-10 17:51:11 (12928): 
Command: VBoxManage -q showhdinfo "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2024_04_30_prod.vdi" 
Exit Code: 0
Output:
UUID:           3bbae7b0-9837-4992-8ac4-5c7feef1de80
Parent UUID:    base
State:          created
Type:           multiattach
Location:       C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2024_04_30_prod.vdi
Storage format: VDI
Format variant: dynamic default
Capacity:       20480 MBytes
Size on disk:   781 MBytes
Encryption:     disabled
Property:       AllocationBlockSize=1048576

2024-10-10 17:51:11 (12928): 
Command: VBoxManage -q storageattach "boinc_bdfe9cb5f9769887" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --mtype multiattach --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2024_04_30_prod.vdi" 
Exit Code: -2135228409
Output:
VBoxManage.exe: error: Cannot attach medium 'C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2024_04_30_prod.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 785 of file VBoxManageStorageController.cpp

2024-10-10 17:51:11 (12928): 
Command: VBoxManage -q showhdinfo "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2024_04_30_prod.vdi" 
Exit Code: 0
Output:
UUID:           3bbae7b0-9837-4992-8ac4-5c7feef1de80
Parent UUID:    base
State:          created
Type:           multiattach
Location:       C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2024_04_30_prod.vdi
Storage format: VDI
Format variant: dynamic default
Capacity:       20480 MBytes
Size on disk:   781 MBytes
Encryption:     disabled
Property:       AllocationBlockSize=1048576

2024-10-10 17:51:11 (12928): 
Command: VBoxManage -q closemedium disk "C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2024_04_30_prod.vdi" 
Exit Code: 0
Output:

2024-10-10 17:51:12 (12928): 
Command: VBoxManage -q showhdinfo "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2024_04_30_prod.vdi" 
Exit Code: 0
Output:
UUID:           3bbae7b0-9837-4992-8ac4-5c7feef1de80
Parent UUID:    base
State:          created
Type:           normal (base)
Location:       C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2024_04_30_prod.vdi
Storage format: VDI
Format variant: dynamic default
Capacity:       20480 MBytes
Size on disk:   781 MBytes
Encryption:     disabled
Property:       AllocationBlockSize=1048576

2024-10-10 17:51:12 (12928): 
Command: VBoxManage -q storageattach "boinc_bdfe9cb5f9769887" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2024_04_30_prod.vdi" 
Exit Code: 0
Output:

2024-10-10 17:51:12 (12928): 
Command: VBoxManage -q storageattach "boinc_bdfe9cb5f9769887" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium none 
Exit Code: 0
Output:

2024-10-10 17:51:13 (12928): 
Command: VBoxManage -q storageattach "boinc_bdfe9cb5f9769887" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --mtype multiattach --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2024_04_30_prod.vdi" 
Exit Code: 0
Output:

2024-10-10 17:51:13 (12928): 
Command: VBoxManage -q storageattach "boinc_bdfe9cb5f9769887" --storagectl "Hard Disk Controller" --port 1 --device 0 --type dvddrive --medium "C:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso" 
Exit Code: 0
Output:

2024-10-10 17:51:13 (12928): 
Command: VBoxManage -q bandwidthctl "boinc_bdfe9cb5f9769887" add "boinc_bdfe9cb5f9769887_net" --type network --limit 1024G 
Exit Code: 0
Output:

2024-10-10 17:51:13 (12928): 
Command: VBoxManage -q modifyvm "boinc_bdfe9cb5f9769887" --natpf1 ",tcp,127.0.0.1,62149,,80" 
Exit Code: 0
Output:

2024-10-10 17:51:14 (12928): 
Command: VBoxManage -q list extpacks
Exit Code: 0
Output:
Extension Packs: 0

2024-10-10 17:51:14 (12928): 
Command: VBoxManage -q sharedfolder add "boinc_bdfe9cb5f9769887" --name "shared" --hostpath "C:\ProgramData\BOINC\slots\6/shared"
Exit Code: 0
Output:

2024-10-10 17:51:17 (12928): 
Command: VBoxManage -q startvm "boinc_bdfe9cb5f9769887" --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_bdfe9cb5f9769887" to power on...

2024-10-10 17:51:18 (12928): 
Command: VBoxManage -q snapshot "boinc_bdfe9cb5f9769887" list 
Exit Code: -108
Output:
This machine does not have any snapshots

2024-10-10 17:51:18 (12928): 
Command: VBoxManage -q bandwidthctl "boinc_bdfe9cb5f9769887" remove "boinc_bdfe9cb5f9769887_net" 
Exit Code: 0
Output:
VBoxManage.exe: error: Bandwidth groups cannot be deleted while the VM is running

2024-10-10 17:51:18 (12928): 
Command: VBoxManage -q unregistervm "boinc_bdfe9cb5f9769887" --delete 
Exit Code: 0
Output:
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

2024-10-10 17:51:23 (12928): called boinc_finish(-2147467259)

</stderr_txt>
]]>

©2024 CERN